Web-based office suite, not in the cloud

Question

Are there any collaborative web-based office suites that I could install on my own server? Something like Google Docs, without storing data on Google.

I need at least a basic word processor and a spreadsheet.

Answer 1

There's Feng Office (community edition is self hosted). I've been playing with it and it's pretty straightforward.

Answer 2

Not sure about the spreadsheet but you could use Etherpad for the document collaboration.

Etherpad ... allows really real-time document collaboration for groups of users. Etherpad is open source; you can host your own Etherpad by downloading the source code or try Etherpad for free on one of the Public Sites.

Hope this helps.