BBEdit

Synopsis
This fully featured editor for Macs has a dedicated user community.

User commentary
Please sign all comments.

System requirements

 * Mac OS X 10.4 or later (10.4.11, 10.5.8, 10.6.2 or later recommended)
 * Universal application (for both Intel and PowerPC-based Macs)

Tech support
http://www.barebones.com/support/bbedit/index.html

Current version number and date of release
9.2 (YYYY-MM-DD)

How to download or buy
http://www.barebones.com/products/bbedit/

Additional notes
wikipedia page