is a wiki the best tool for browser-based collaboration?

[clay]

I would like to setup a website that will be used by several users and is easily/quickly editable by all users. I know this can be accomplished with a wiki, but I don't need anything that complex for this website (it could work if there's nothing else out there). I'd really only need a single page which is editable as opposed to every page on a website.

are there other free/opensource tools that can be installed on a standard web server (LAMP) that are worth checking out?

thanks!