Today, I have had a high interest in Collaborative Editors because of the post I made earlier about the Web-based collaborative system, Chalk. So, I decided that I would take a look around and see what I can find. I now have a list of 5 Real-time Collaborative Editors:

SubEthaEdit - View SubEthaEdit - Available for Macintosh
“The idea of collaborative editing has been researched for years, with notable results. But now for the first time it has been implemented in a way you actually want to use: A sophisticated technique allows all users to type anywhere in the text without locking parts of the text for other users, making SubEthaEdit just as easy to use as a traditional text editor.” (Commercial Product: $35)

Gobby - View Gobby - Available for Windows, Macintosh, and Linux
“Gobby is a free collaborative editor based on libobby, a library which provides synced document buffers. It supports multiple documents in one session and a multi-user chat. It runs on Microsoft Windows, Mac OS X, Linux and other Unix-like platforms.”

MoonEdit - View MoonEdit - Available for Windows, Macintosh, and Linux
“Cooperative multi-user text editing over the internet. Every co-author can edit the shared document at any time, from any place, and at the same time! There’s no need to send files via FTP or to compare documents when multiple users need to make changes to it independently.”

DocSynch - View DocSynch - Available for various text-editors
“DocSynch is a collaborative editing system on top of IRC. By transforming single-user editors into multi-user editors, it allows to remotely edit text documents together. Implementations are targeted as extensions to many popular text editors and IDEs. A working version is available for jEdit.” There are also implementations for VIM, Eclipse, and MS Visual Studio available from the DocSynth website.

LivePad - View LivePad - Web-Based Editor
“LivePad is the Final Year Project of Ming Hong Ng. It is a near real-time web-based collaborative editor for Mozilla and its derivatives, like Mozilla Firefox.

Its user interface is written as XUL, a fundamental XML language for defining user interfaces in Mozilla applications. The client-side processing is done with JavaScript while the server-side processing is done with PHP. The data storage is handle with SQLite, a zero-configuration ACID-compliant SQL database engine.

Other web standards in use include CSS for styling and positioning and DTD/properties for localization.”

This concludes my findings. Hope the listing was of some use. If you know of any others, I would gladly add them to the list.

Enjoy.