wav editor

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

miniWEBEdit is a (X)HTML editor.

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

PlayerPro is a music composer and sound editor.

Drag and image file to the editor window or the application icon in the Dock.

Real-time collaborative rich-text editor.

Emacs-style editor for programmers.

LayoutKitchen is an editor for SwitchXS scan panels.

mi is a text editor to write HTML source.

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