Test your code online

[daxda]

I'll share some sites with you on which you can test your code online:

http://www.jmarshall.com/easy/html/testbed.html  -  HTML
http://writecodeonline.com    -  PHP and JavaScript
http://jsfiddle.net/    -  JavaScript (with jQuery and more fancy stuff), HTML, CSS
http://codepad.org/    -  C, C++, D, Haskell, Lua, OCaml, PHP, Perl, Python, Ruby, Scheme and Tcl
http://labs.codecademy.com/  -  Ruby, Python and JavaScript
http://www.jdoodle.com/    -  Java
http://cssdesk.com/   -  HTML and CSS
http://codepen.io/pen/  - HTML, CSS and JS
http://esoteric.sange.fi/brainfuck/impl/interp/i.html  - Brainfuck

http://regexpal.com/   -  Regular Expression
http://www.gskinner.com/RegExr/  -  Regular Expression

[techb]

A bit of info on the sites that do python sys.version:

CodeAcademy:
2.7.2 (default, Sep 14 2011, 04:10:57)
[GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build)]

CodePad:
2.5.1 (r251:54863, May  4 2007, 16:52:23)
[GCC 4.1.2]