WIDE

Remote Interview is an online tool for tech recruiters to hire best programmers and coders by analyzing their coding skills.

ideone.com is a... pastebin. But a pastebin like no other on the Internet. More accurate expression would be
"online mini IDE and debugging tool".

Ideone is an Italian word for great ideas - because ideone.com is a place where your greatest ideas can spring to life.

Online Interpreters in JavaScript. Online coding and REPL. Run and share code. Try QBasic, Forth, Ruby, Python, Lua, Scheme, Emoticon, Brainfuck, LOLCODE, Unlambda, Bloop, JavaScript, Javascript.next, Move, Kaffeine, CoffeeScript, Roy programming languages.

ICEcoder is a browser code editor which provides a modern approach to building websites. By allowing you to code directly within the web browser, online or offline, it means you only need one program (your browser) to develop sites, plus can test on actual web servers. After development, you can also maintain the website easily, all of which make for speedy and smart development.

Because it can be web based you can use it from any internet enabled computer with a modern browser and because it's open-source, customise it to your liking, integrating with online services. If you'd like to use it as a desktop code editor, no problems, you only need PHP 5.0+ (though 5.3+ is recommeded), so you can use on Linux and on PC via MAMP or XAMPP and Mac via WAMP (or another PHP installation).

The hosted version of ICEcoder is available as a 14 day trial; the previous release is available for free.

The source code is published under a libre/open source license: https://github.com/mattpass/ICEcoder

CodeChef was created by Directi as a way to continuously challenge and engage the developer community. Our goals are to provide a platform for practice, competition and improvement as well as enable developers to benchmark their skills against their peers. We’re having fun with the site and hope you will too.

The Online Compiler is a web based coding platform with a beautiful UI and gives very fast results. Run code in C, C++, Java, Python and many other languages. Save your program in cloud and share with others seamlessly. .

ShiftEdit is a free web based IDE.
Features: Syntax highlighting, Integrated (S)FTP, Tabs, Find/Replace, Revision history, bookmarks.

"The web-based IDE is one of the final frontiers of apps ported to the web. I would like to be able to develop from any computer or operating system and have the same experience without having to install software or create site definitions."
Adam Jimenez (founder)

PaizaCloud Cloud IDE is a browser-based online development environment for web development like Ruby on Rails, Node.js, Django, PHP, Laravel, etc.