SmartMarkUP is a flexible & lightweight JavaScript library that turns any textarea into a markup editor.

It can be configured to edit HTML, CSS, XML, Wiki syntax & BBCode.

The library is unobtrusive & degrades gracefully if JavaScript is disabled.

SmartMarkUP has a simple and powerful API. Styles can be changed, new markups can be implemented, extra buttons and submenus can be created & more.

It also supports keyboard shortcuts for easier usage & has add-on support like color picker, search-replace, special character picker (and new ones can be created).

markItUp! is a lightweight and customizable jQuery plugin which turns any textarea into a markup editor.

It has ready-to-use tag sets for HTML, textile, wiki syntax, markdown and BBcode inputs. Also, you can easily create your own.

Some powerful features of this markup editor are:

• Fast and unobtrusive integration
• Support for keyboard shortcuts
• Fully customizable and scriptable
• Ajax dynamic preview
• Customizable skins