acrobet editor

MIDI batch editor and browser.

Text editor with live Markdown editing and HTML preview.

Markdown editor for Web developers.

GNU Emacs editor for OS X.

Open-source midi tracker/editor.

Screensaver designer/editor.

Stor is a MySQL editor that gives a spreadsheet-like interface

Easy to use text editor with encrypting feature.

SEEdit Pro is XHTML/CSS RSS editor.

Full screen rich text editor for Mac OS X