ps editor

Fraise is a free text editor which is both easy to use and powerful

Seashore is an open source image editor for Mac OS X's

PlayerPro is a music composer and sound editor.

Real-time collaborative rich-text editor.

mi is a text editor to write HTML source.

you can create simple animations with Curly. (was Cartoon Editor)

HunAgurk is a free and easy to use html editor.

PhotoGPSEditor is an easy to use meta-data editor for photo files.

PatentCog is a patent specification editor for professional patent writers

Text editor allows combining documents as a workbook.