Coffeescript Websites
Create a new fiddle - JSFiddle
Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Not Applicable 
$ 8.95
Repl.it - The world's leading online coding platform
Powerful and simple online compiler, IDE, interpreter, and REPL. Code, compile, and run code in 50+ programming languages: Clojure, Haskell, Kotlin (beta), QBasic, Forth,...
7,382 $ 2,180,520.00
Train with Programming Challenges/Kata | Codewars
Codewars is where developers achieve code mastery through challenge. Train on kata in the dojo and reach your highest potential.
24,851 $ 609,840.00
Plunker
Plunker is an online community for creating, collaborating on and sharing your web development ideas.
Not Applicable $ 8.95
The collaborative browser based IDE - Replit
Run code live in your browser. Write and run code in 50+ languages online with Replit, a powerful IDE, compiler, & interpreter.
2,137 $ 7,533,000.00
MOD Synth
MOD is an experiment where you can create your own modular synthesizer, or emulate different synths by simply drag and drop components.
4,312,548 $ 240.00
Repl.it - 404 - Replit
Replit is a simple yet powerful online IDE, Editor, Compiler, Interpreter, and REPL. Code, compile, run, and host in 50+ programming languages.
Not Applicable $ 8.95
Benjamin Lupton
Website of Benjamin Lupton. Founder of Bevry, DocPad and History.js. Web developer for 10 years. Now a trader. Studies psychology and philosophy.
Not Applicable $ 8.95