コラボレーションが出来るテキストエディタmoonedit

マックにはsubethaeditがあるけれども有料。mooneditはwindowsやlinux上でインターネットを介してリアルタイムにコラボレーションが出来るテキストエディタ。

Remote text editing without latency.
"ME" uses local prediction code - the same technology used in modern video games! You can use a dedicated standalone server to share a whole directory of text files. Remote users can then edit these files using the "me" client - at the same time. This functionality can be useful for creating websites directly on the www server - which is more efficient than editing files privately and then uploading them via FTP. You could even use "ME" to run a real-time text forum :)

http://me.sphere.pl/indexen.htm
http://www.codingmonkeys.de/subethaedit/