Always free

Exercism

Exercism is an online programming practice platform that provides language tracks, coding exercises, automated feedback, and human mentoring across 83 programming languages. It supports both local CLI-based workflows and an in-browser editor for solving exercises.

Visual Studio Code

Visual Studio Code is a source-code editor from Microsoft that runs on macOS, Windows, Linux, and the web. The page describes it as an open source AI code editor with support for multi-agent development, extensions, documentation, an API, and web-based editing through vscode.dev.

Namae is a name availability checker for new app, library, and organization projects. It queries multiple registries at once so a developer can compare candidate names across domains, package registries, social platforms, app stores, and hosting services from a single search.

W3Schools

W3Schools is a web development learning platform that provides tutorials, references, exercises, quizzes, code challenges, and certification courses across topics such as HTML, CSS, JavaScript, Python, SQL, and related web technologies.

Google Hosted Libraries

Google Hosted Libraries is a content delivery network for popular open-source JavaScript libraries. It serves versioned library files from ajax.googleapis.com so developers can load common dependencies such as jQuery, jQuery UI, D3.js, Bootstrap, and three.js with a stable URL and browser caching.

FreeFlarum

FreeFlarum is a hosted forum service for creating and managing Flarum communities. It provisions a forum instance from a signup form, handles updates and extensions, and provides export support so forum owners can move their data out at any time.

micro-jaymock

micro-jaymock is a tiny API mocking microservice that accepts a JSON template in a POST request and returns generated fake JSON data. It supports template fields such as names, addresses, finance values, repeated objects, and other fake-data generators exposed through jaymock.

DKIMValidator.com is a web-based email validation service that accepts messages sent to any address at @dkimvalidator.com and then reports DomainKeys, DKIM, SPF, and SpamAssassin results in one place....

Dubble is a browser extension that records a user's workflow and turns it into step-by-step documentation with screenshots, videos, and editable text. The product supports recording, editing descripti...

reSmush.it

reSmush.it is a WordPress image compression plugin and HTTP API that compresses JPEG, PNG, GIF, TIF, and BMP files in the cloud. It supports image submission through the WordPress plugin, direct API c...

quicktype

quicktype is a code generation tool that converts JSON, JSON Schema, sample API responses, URLs, and GraphQL queries into strongly typed models and serializers for multiple programming languages.

Pipedream Request Bin

Pipedream Request Bin provides a public URL for collecting HTTP requests and webhook payloads, then inspecting the incoming headers, body, and other request details in a human-friendly interface.

Jitsi Meet

Jitsi Meet is a web and mobile video conferencing service for starting and joining meetings from a browser or app. The page links to iOS, Android, and F-Droid apps, and also offers a Slack integration for launching meetings from Slack.

EveryStep Browser Automation

EveryStep Browser Automation is a browser-based web scripting tool from Dotcom-Monitor that records user actions and replays them in a real browser. It supports desktop and mobile browser testing, scheduled script execution, and alerting when errors are detected.

localhost.direct is a developer utility that provides a localhost domain with HTTPS support and wildcard subdomain handling. It lets local development work run natively on localhost.direct without extra configuration, with the exception of the reserved get.localhost.direct subdomain.

Let’s Encrypt is a certificate authority that issues free Domain Validation (DV) TLS certificates for websites and other domain-based services. It uses the ACME protocol and automated clients to let operators obtain, renew, and manage certificates without manual issuance.

Element

Element is a secure communications platform built on the Matrix open standard. It provides self-hosted and air-gapped messaging, voice and video calls, federation between separate organisations, and administrative controls for enterprise and public-sector deployments.

Test TLS

Test TLS is a free online scanner for TLS configuration of servers. It checks a domain name or IP address on a specified TCP port and reports TLS configuration settings, security vulnerabilities, and the server's X.509 certificate.

Statuspile

Statuspile is an open-source status dashboard for tracking the status pages of multiple service providers in one place. It provides a web dashboard where users can add and remove providers, save their configuration through Auth0 login, and fork the code from GitHub.

Semaphr

Semaphr is a mobile app management platform for iOS, Android, and React Native apps. It lets developers block specific app versions, force updates, and send in-app messages when a release needs to be stopped or users need to be notified.

Metalama is an open-source patterns and architecture toolkit for C# built on Roslyn. It lets developers define aspects and project fabrics in C# so the compiler can generate repetitive code at build time and report architecture violations in the IDE as code is written.

CyberChef is a browser-based web application for analysing, decoding, and transforming data with a drag-and-drop recipe interface. It runs entirely in the browser with no server-side component, and su...

Befonts

Befonts is a font download website that publishes free fonts for personal and commercial design projects. The site organizes fonts by category, style, and trend, and provides browsing, font identification, and text tools alongside individual font download pages.

rawgit.hack

rawgit.hack is a CDN and caching proxy for source code hosting services. It fetches raw files from repositories on GitHub, Bitbucket, GitLab, Gitea, and Codeberg, then serves them with correct Content-Type headers for browser use.

CORS Tester

CORS Tester is a web-based tool for checking Cross-Origin Resource Sharing behavior against an API endpoint. It accepts an API URL, origin, HTTP method, optional credentials, custom headers, and request body, then returns preflight response headers and API server response headers for review.

JSON Swiss

JSON Swiss is a browser-based JSON toolkit that combines formatting, validation, repair, visual table editing, conversion, schema generation, comparison, and code generation in one workflow. The forma...

xz/fonts is a free and open source CDN for delivering open source font families to websites using CSS. It serves font files through bunny.net's global content delivery network and only includes open source fonts.

JustBlogged is a hosted blogging platform that lets users create and publish a blog from a web interface in about 2 minutes. The service includes blog hosting, custom domains with free SSL, default themes, built-in SEO metadata, and an API for publishing and integrations.

Skypack

Skypack is a CDN for optimized npm packages that serves JavaScript modules directly from URLs such as https://cdn.skypack.dev/package-name. It preoptimizes packages for browser use and supports packag...

Core Web Vitals History

Core Web Vitals History is a web tool that fetches historical Core Web Vitals data for a given URL from Google’s CrUX History API. It shows the last 6 months of available data and does not capture or store metrics itself.

maps.stamen.com is a web map tile viewer for Stamen map styles, including Toner, Terrain, and Watercolor. It presents interactive map previews and links to style variants such as labels, lines, background, lite, dark, and blacklite for Toner, plus standard, labels, lines, and background for Terrain.

Free Mail Tester

Free Mail Tester is a web-based email deliverability checker that generates a unique test address, accepts a message sent from a real mail client or campaign tool, and returns a 0–100 score with analy...

Quant-UX is a web-based research, usability testing, and prototyping tool. It provides a visual editor for creating interactive prototypes, then lets users share a link to collect user feedback, run tests, and review analytics in the same product.

MailCatcher

MailCatcher is a local SMTP server that captures messages sent to it and displays them in a web interface. Developers point applications at smtp://127.0.0.1:1025, then review received mail at http://127.0.0.1:1080/.

ServerAvatar

ServerAvatar is a cloud server management panel for PHP, WordPress, Laravel, Node.js, and related web applications. It connects to existing VPS or cloud instances and provides a web dashboard for serv...

Fontshare

Fontshare is a font library and distribution platform from Indian Type Foundry that provides downloadable font families for personal and commercial use. The catalog includes both Closed Source fonts under ITF’s Free Font License and Open Source fonts under the SIL Open Font License.

AnyDesk

AnyDesk is a remote access and remote support application that connects a client to a remote device over the network. The pricing page shows plans for Solo, Standard, Advanced, and Ultimate, with feat...

HTTP Observatory

HTTP Observatory is a Mozilla tool that scans a website’s HTTP headers and related security settings to check compliance with common security best practices.

VSCodium

VSCodium is a community-driven binary distribution of Microsoft Visual Studio Code built from the open-source vscode repository and released under the MIT license. It packages the editor without Micro...

Statically

Statically is a free global CDN for Git repositories and npm packages. It serves optimized files from GitHub, GitLab, Bitbucket, GitHub Gist, and npm through fixed CDN URL patterns, allowing developers to reference repository assets directly from a global edge network.

Fizzy

Fizzy is a kanban application for tracking bugs, issues, ideas, and small projects. It provides boards, cards, notifications, webhooks, public board links, auto-close behavior for old cards, and stamps that record who filed items and when.

Fibo

Fibo is a poker planning and story estimation web app for agile teams. It lets users create or join a session, start a voting round, and reveal estimates in real time using Fibonacci numbers.

IntenseDebate

IntenseDebate is a comment system for blogs and websites that adds threaded replies, reply-by-email, email notifications, commenter profiles, moderation and blacklisting controls, social sign-in, and ...

Gitter

Gitter is a chat and networking platform for developer communities. It runs on Matrix and connects to the gitter.im homeserver, so users can access rooms through the Gitter web app or any Matrix client they prefer.

Pastefy

Pastefy is a web-based pastebin for sharing code snippets and text pastes. Users can create a paste, share it publicly, organize pastes into folders, and use client-side encryption for secret snippets.

RustDesk

RustDesk is an open-source remote desktop and remote support application that connects clients through RustDesk relay and rendezvous servers. It supports self-hosted deployment with Docker Compose, and the server can be run from the provided OSS or Pro compose files.

talky

Talky is a browser-based video chat and screen sharing service that creates a unique room URL for each call. Users enter a name or start a chat, then share the room link with up to 6 participants who join through a supported browser without creating personal accounts.

Full Stack open

Full Stack open is a free online course on modern web development from the University of Helsinki. It covers React, Redux, Node.js, MongoDB, GraphQL, TypeScript, React Native, CI/CD, containers, relat...

ttl.sh

ttl.sh is an anonymous, ephemeral OCI registry for pushing and pulling container images and other OCI artifacts with a time-to-live tag. Users can push artifacts with no authentication, no account, and no configuration, then retrieve them until the TTL expires automatically.

Hurricane Electric Free DNS is a hosted DNS management portal for forward and reverse DNS zones. It supports dual-stack access over IPv4 and native IPv6, and provides record management for A, AAAA, ALIAS, CNAME, CAA, MX, NS, TXT, SRV, SSHFP, SPF, RP, NAPTR, HINFO, LOC, and PTR records.

UNPKG

UNPKG is a fast, global content delivery network for npm packages. It serves files from npm over versioned URLs such as https://unpkg.com/:package@:version/:file, and can resolve package entry points, subpaths, semver ranges, and npm dist-tags.

SQLable

SQLable is a website that provides developer tools and posts related to SQL and databases. The site includes utilities for formatting SQL, validating queries, working with regular expressions, generating data, and comparing or transforming CSV files.

OpenReplay

OpenReplay is a self-hosted session replay and product analytics platform. It records user interactions in web and mobile applications so developers can replay sessions, inspect console errors, network activity, performance metrics, funnels, heatmaps, and journey analysis from the same product.

FreeDNS

FreeDNS is a hosted DNS management service from 1984 that lets users configure and manage domain zones through a web interface. It supports common record types including A, AAAA, CAA, CNAME, MX, SRV, TXT, SSHFP, DNSSEC, TLSA, web request forwarding, and Dynamic DNS.

utterances

Utterances is a lightweight comments widget that uses GitHub Issues as the backing store for site comments. It matches a page by URL, pathname, or title, then uses the GitHub Issues search API to find or create the associated issue when a visitor comments.

pollinations.ai

pollinations.ai provides APIs for generating images, text, audio, and video from AI models. The service is accessed through developer-facing endpoints and documentation, with community support and a web play area for trying the product.

Font sensei

Font sensei is a Google Fonts browser that organizes the catalog by tag names and lets users filter typefaces by style categories such as condensed, cursive, geometric, handwritten, and more. The land...

3Cols

3Cols is a cloud-based code snippet manager for storing, organizing, and sharing snippets across boards. It provides browser-based access, a public snippet area, private board sharing, organization management, an API, and a VS Code extension for working with snippets from the editor.

Tenzu

Tenzu is a web-based task and project management tool that uses Kanban boards, workspaces, and collaborative editing to organize work. It includes real-time co-authoring on task content, attachments, comments, a REST API, and support for multiple languages.

point.poker

point.poker is a browser-based Planning Poker tool for distributed teams to estimate work using Scrum Poker, Pointing Poker, or Point Poker sessions. Users can create a session and join from desktop, tablet, or smartphone without registration.

SMSGate

SMSGate is an open-source SMS gateway for Android devices that exposes a REST API, client libraries, and a CLI for sending and receiving SMS messages through a connected phone. It supports Android 5.0...

FontGet

FontGet is a font database and font generator website that lets users browse, preview, and download fonts for use on websites and desktop systems. The landing page shows category-based navigation, fon...

MySQL Visual Explain

MySQL Visual Explain is a web tool that converts MySQL EXPLAIN output into a visual query plan. It accepts a SQL query and shows the execution structure in a simpler format than the raw EXPLAIN text, with example plans for joins, subqueries, and complex queries.

Photopea

Photopea is a browser-based image editor that runs locally on the user’s device. The page states that files are not uploaded, that the editor uses the device CPU and GPU, and that it can be used offline after loading the site.

NewReleases.io

NewReleases.io is a release tracking service for software developers and DevOps teams. It monitors supported source code and package registries such as GitHub, GitLab, Codeberg, Gitea, Bitbucket, PyPI...

Pixela

Pixela is a REST API service for recording and tracking habits, effort, and other day-series activity data. Users create an account, define a graph, and post dated values through HTTP requests; the service then renders the data as a GitHub-like graph or badge.

ScreenSharing

ScreenSharing is a browser-based screen sharing service that lets a user start a session from the web, choose a screen or application window, and share a generated link with viewers. The page describe...

noip.at DynDNS

noip.at DynDNS is a dynamic DNS service that updates hostnames to point to changing IP addresses. The landing page describes it as a free service with no tracking, no logging, and no advertising, and links to the source code on GitHub.

Savannah

Savannah is a free software hosting forge for GNU and non-GNU projects. It provides project registration and hosting for source code, issue tracking, support requests, tasks, patches, mailing lists, and project statistics.

Yap.Town

Yap.Town is a language-learning web app that combines spaced repetition with comprehensible input. It presents vocabulary in real sentences drawn from movies and TV, then schedules reviews using FSRS so learners see words in context rather than isolated flashcards.

HNcast

HNcast is a web player for Hacker News stories that presents top stories one at a time as brief audio playback. The interface includes story browsing, playback controls, bookmarks, a feed view, and stats pages, with sign-in support for saving user state.

TTS Studio

TTS Studio is a text-to-speech web interface with controls for language, voice, pitch, and speaking rate. Users enter text, choose a voice and language, adjust pitch and rate, then generate speech output.

AIDE Memory is a local-first memory layer for AI coding agents and teams. It installs via npm, creates a .aide/ directory, configures MCP tools and editor rules, and stores memories as JSON files in t...

OMAR

OMAR is a terminal user interface for orchestrating hierarchies of AI agents from a single tmux session. It runs on macOS and Linux, supports multiple agent backends including Claude Code, Codex CLI, ...

Piruetas

Piruetas is a private journal web application for writing one entry per day, with support for images and basic text formatting. It stores entries privately by default and includes export and share-link features for individual days.

daily.dev

daily.dev is a developer news and community platform that aggregates articles, tools, frameworks, and industry updates into a personalized feed. It is available as a web app and browser extension, with mobile apps for iOS and Android.

CapRover

CapRover is a self-hosted platform as a service for deploying and managing web applications and databases on Docker. It provides a web dashboard and CLI for app deployment, SSL setup with Let's Encryp...

Coolify

Coolify is an open-source, self-hostable deployment platform for websites, databases, web applications, and Docker-compatible services. It connects to servers over SSH and supports deployment targets such as VPS instances, Raspberry Pi, EC2, DigitalOcean, Linode, and Hetzner.

Gradio

Gradio is a Python library for building web interfaces around machine learning models and other Python functions. It provides high-level components such as textboxes, images, audio, plots, chatbots, d...

GitHub Pages

GitHub Pages is a static website hosting service for content stored in a GitHub repository. A site is published by editing files in the repository and pushing commits; GitHub then serves the generated pages from the repository source.

Gemini

Google Gemini is a personal AI assistant from Google designed to help users write, plan, research, and learn through conversational interactions. It provides a chat-based interface with tools such as ...

Excalidraw

Excalidraw is an online whiteboard and diagramming platform designed for fast sketching, collaboration, and sharing. It combines a simple hand-drawn aesthetic with a full-featured editor so teams and ...

GitGud.io is a free and fast Git hosting service built on GitLab and operated by Sapphire. It provides a developer-focused platform for hosting repositories, collaborating on code, and managing projects with a strong emphasis on privacy, reliability, and direct support.

Hoppscotch

Hoppscotch is a developer-first API platform for creating, testing, documenting, and sharing APIs. It is designed to help teams move from prototyping to production without switching tools, and it supports both cloud use and self-hosted deployment.

RocketGit is a free, privacy-focused Git hosting service for public and private repositories. It is offered as free software under AGPLv3+, with an emphasis on avoiding vendor lock-in, respecting contributor privacy, and supporting both hosted and on-premise use.

Chisel

Chisel is a Fossil SCM hosting service that provides a managed home for Fossil repositories. It is designed for teams and individuals who want a simple way to host source code with built-in repository access controls and public sharing options.

KanbanFlow

KanbanFlow is a lean project management platform designed to help individuals and teams organize work visually and improve delivery flow. It combines a Kanban board with time tracking, reporting, and collaboration features in a single workspace.

jsDelivr

jsDelivr is a free CDN for open source projects that serves JavaScript and ESM assets from npm and GitHub. It supports direct file URLs, version ranges, default entry points, directory listings, on-demand minification, source maps, and combining multiple files.

BootstrapCDN

BootstrapCDN is the official CDN service for Bootstrap and Font Awesome, with additional support for Bootswatch and Bootstrap Icons. It provides production-ready CDN links and copy-ready snippets for CSS and JavaScript assets, helping developers load popular front-end libraries quickly and reliably.