Collaborative editor

A collaborative editor enables people to work on a text document simltaneously from different internet accesses.

also community-wiki: collaborative editor
 * MoonEdit, not open source, no mac version, a perfect history, typing sound in win version
 * Gobby, open source, cross-platform. Released in June 05.
 * subethaedit, only mac (?), free for non-commercial use
 * PabloDraw, open source, windows only
 * ACE open source, cross-platform, uses Java