Ace Editor (Javascript Mode)
You can find the offical website
12/*** In fact, you're looking at ACE right now. Go ahead and play with it!
Ace Editor (Html Mode And Emmet)
You can find the offical website
12<!--* We are currently showing off the Html mode. ACE has support for 45
Ace Editor (Css Editor)
You can find the offical website
12/* Some example CSS */