I realize some similar questions have been asked along these lines before, but from reading-through them today, it appears they don't match my use case.

I am looking for a web-based, non-hosted time and project tracking tool. I've downloaded Collabtive and Achievo so far, but am looking for other suggestions, too.

My list of requirements:

• runs on standard LAMP stack
• non-hosted (ie, there is an option to download and run it on a local server)
• not a desktop/single-user application
• easy-to-use - my audience is a mix of technical and non-technical folks
• easy to maintain - when time for upgrading comes, I'd really like to not have to rebuild the app (a la ./configure ; make ; make install)
• needs to support multiple users
• free-form project additions: we don't have a central project management authority (users should be able to add whatever they're working on, not merely from a drop-down)

Does anyone here have experience with such tools? It doesn't have to be free.. but free is always nice :)