JSFiddle

[McZealot]

http://jsfiddle.net/ is one of the best coding websites ever. You can script in Javascript, JQuery, HTML, and CSS at the same time. It let's you create miniature web-programs that you can host on their site. I've begun learning Javascript and JQuery recently and It's been really fun to test all my stuff out in JSFiddle.

tldr: you program cool stuff on it and other people can play with it

Some stuff I've made: (Remove embedded/result/ if you want to read the source-code)

Trade Route Game
A game where you pick the best possible trade routes, trying to go as long as you can before going bankrupt:
http://jsfiddle.net/McZealot/8y937wxb/embedded/result/

Storyteller
A basic program that gradually tells a story as it fades out:
http://jsfiddle.net/McZealot/L2nzth2b/embedded/result/

Post things you've made in JSFiddle. Or other websites, if you want to.

[Ad Bot]

[K1ng_0f_N0thing]

Playing the trade route game. It's pretty fun

EDIT: Made it to 15

[ButlerBlockhead125]

Trade route is insanely addicting, great job zealot.

Lost when my rations glitched to the negatives a second time.

[Flame]

huh, neat

[Steve5451²]

http://jsfiddle.net/g7zw5t5n/1/

click to change songs, the other two have lyrics at the bottom

[Katla]

There's also http://codepen.io/, but it seems to be focused on visually pleasing things rather than functional things.
Like this one: http://codepen.io/kryo2k/pen/LEjKZq