What WYSIWYG editor does Stackoverflow use?

Question

This is a great editor. Did you guys build it?

Duplicate.

Answer 1

They use WMD and are currently deconstructing it. See github.

Answer 2

It's a customized version of the WMD editor.

EDIT: Jeff talked about their changes on the Stack Overflow blog: http://blog.stackoverflow.com/2009/01/updated-wmd-editor/.

Answer 3

If I'm not mistaking by viewing page source it's using wmd-editor

Answer 4

Duplicate: http://stackoverflow.com/questions/480289/using-the-stackoverflow-rich-text-system-closed