### Index * [Angular](#angular) * [ClojureScript](#clojurescript) * [Crystal](#crystal) * [CSS](#css) * [FlexBox](#flexbox) * [Go](#go) * [Haskell](#haskell) * [JavaScript](#javascript) * [Kotlin](#kotlin) * [.Net](#dotnet) * [Node.js](#nodejs) * [Perl](#perl) * [PHP](#php) * [Python](#python) * [R](#r) * [Ruby](#ruby) * [Rust](#rust) * [SQL](#sql) ### Angular * [Plunker](http://plnkr.co) ### ClojureScript * [Web REPL](http://clojurescript.net) ### Crystal * [Compile & run code in Crystal](https://play.crystal-lang.org/#/cr) ### CSS * [CodePen](http://codepen.io) * [CSSdeck](http://cssdeck.com) * [CSSdesk](http://cssdesk.com) * [Dabblet](http://dabblet.com) ### FlexBox * [Echoplex](http://the-echoplex.net/flexyboxes/) ### Go * [Go Playground](https://play.golang.org) ### Haskell * [Try Haskell](https://www.tryhaskell.org) ### JavaScript * [CodePen](http://codepen.io) * [CodeSandbox.io](https://codesandbox.io) (_React_) * [JSBin](http://jsbin.com) * [JSFiddle](http://jsfiddle.net) * [Plunker](http://plnkr.co) * [Sololearn](https://code.sololearn.com/#html) ### Kotlin * [Kotlin](https://try.kotlinlang.org) ### <a name="dotnet"></a>.NET * [.NET Fiddle](https://dotnetfiddle.net) ### NodeJS * [Ideone](http://ideone.com) ### Perl * [Perl](http://tryperl.pl) ### PHP * [Codepad](http://codepad.org) * [PHPFiddle](http://phpfiddle.org) * [PHPTester](http://phptester.net) ### Python * [Codepad](http://codepad.org) * [Pyfiddle](https://pyfiddle.io) ### R * [R-Fiddle](http://www.r-fiddle.org) ### Ruby * [Codepad](http://codepad.org) ### Rust * [Rust Playground](http://play.integer32.com) ### SQL * [SQLFiddle](http://sqlfiddle.com) ### Scala * [ScalaFiddle.io](https://scalafiddle.io) * [ScalaFiddle.net](http://scalafiddle.net) * [Scastie](https://scastie.scala-lang.org)