Open Source Collaborative and Presentation Tools?

An anonymous reader asks: "I've been asked to discuss collaboration tools at un upcoming meeting. Things like Groove, DocuShare, and WebEx all have significant costs associated with them, so I'm curious to know what everyone on Slashdot is using (if anything). What kind of software would you use to enable simultaneous document editing with version control, or to sync presentations across participant browsers for an online meeting, etc?"

Re:Not OSS but free

[AdamPiotrZochowski]

not free, needs windows
not real time collaborative, netmeeting can have only one cursor in a file
not real time collaborative, wiki wont let you see real time as someone else is typing

Funny you should mention that.

[holy zarquon's singi]

I've just been employed by a group of academics to come up with something like this over the next 6 months or so. My requirements were open source, perl and apache based with the flexibility to server copyright and draft material to group members, and public domain/less sensitive stuff to anyone. I'm now using Maypole [perl.org] and judicious use of the Template Toolkit, I'm hoping to open source it at the end, and get some employment in my field of choice using it as leverage too.

Trac SCM

[Ankle]

I can recommend Edgewall's trac [edgewall.com] for a svn server/wiki/project manager. It is F/OSS and very flexible in my experience. I am using it for a development community similar to the idea of sourceforge but much smaller and dedicated to extensions/distros/etc of a single OSS project. I am also using it for my own projects and I can highly recommend it.