Behave.js

Behave.js is a lightweight library for adding IDE style behaviors to plain text areas, making it much more enjoyable to write code in. Features include:

Custom Code/Behavior Fencing
Hard and Soft Tabs
Auto Open/Close Parenthesis, Brackets, Braces, Double and Single Quotes
Auto delete a paired character
Overwrite a paired character
Multi-line Indentation/Unindentation
Automatic Indentation

jakiestfu.github.com

Henning Koch 2013-01-28