Developer Tools

Solo

Free AI Website Creator

Storyblok

Headless CMS with Visual Editor

Testing Library

Simple and complete testing utilities that encourage good testing practices

Testing Playground

Simple and complete DOM testing playground that encourage good testing practices

TestingWhiz

A codeless test automation tool

Text Differ

Online Text Comparison Tool

ToolKit

ToolKit is a collection of free online utilities built for developers, designers

Trophy

Trophy is the gamification layer for consumer apps

Trotto

Secure Internal URL Shortener

Upstash

Redis, Vector, Search

Vinktar

Connect Claude Code, Cursor or Codex to your production data

Virgil Security

The Strongest And Simplest Way To Secure Your App

Xray

The #1 Manual & Automated Testing App for Jira

backblaze.com

The object storage layer for AI

framagit.org

Explore projects

heptapod.net

Heptapod FOSS public service

howuku.com

CRO, A/B testing & conversion articles

joonbot

Make a chatbot in minutes with our intuitive no-code chatbot builder

noip

Smarter DNS Starts Here

pCloudy

Mobile and Web App Testing Platform

plot.ly

Interactive Data Visualization Tools & Software

redirection.io

URL redirection service

redirs

Simple domain redirects as a service

uChecker

Email list verification (Good/Bad/Unknown) plus free SPF/DKIM/DMARC DNS checkers

.NET Fiddle

Run C#, F# and VB.net snippets with NuGet Packages

3v4l PHP Playground

Test code in 500+ PHP versions

Adaface PairPro

Assessment Software by Adaface

AniCollection

Collection of CSS animations

Animista

CSS animation generator

Browxy

Online IDE for Awesome Students & Educators

BuildSpin

MVP as a service

CSS Arrow Please

Generates a custom box with an arrow extending out from the side

Codeanywhere

Run many languages in a container with pre-built environment and a terminal

Codeboard

Run snippets in C, C++, Eiffel, Haskell, Java, Python

Codiva

Superfast Online Java Compiler, Editer and IDE

Cookie writer

Create catchy titles, & descriptions in seconds!

CyberChef

The "cyber Swiss Army knife"

DevDocs

Fast, offline, and free documentation browser for developers

Dockside

A Dev and Staging Environment in One

DrRacket

Run Racket with support for macro debugging

FireHire

Fetch. Match. Hire

Flems

Run snippets in HTML/CSS/JS without a connection to the server (after page load)

Glitch

The official blog for glitch.com

Glot

Online Code Playground

Gnovelty

Innovative patent drafting

HASH

Build and run JavaScript, Python, or Rust multi-agent simulations in the browser

IT Tools

Open-source collection of everyday developer utilities

JDoodle

Run snippets from over 100 languages including Haskell, Prolog, MySQL

Judge0

Run snippets from over 40 languages including Erlang, Elixir, OCaml and Octave

Kotlin-Playgrounds

Explore Kotlin and practice your coding skills on the Kotlin Playground!