I have used DokuWiki and like it. If you need a flat-file wiki (without the database, that is), I recommend it.
Alas, DreamHost has shown itself to be somewhat averse to adding to or even updating their one-click installs. The number of software packages available has actually decreased over the years (the developers of some have stopped working on them—such is the inherent danger of open-source software).
However, most of these are easy (if slow) to install via FTP, and some can be installed via the command line (as long as you don't need sudo).
Thank you for this list. Phabricator is new to me and looks promising, and I certainly have uses for LimeSurvey and InvoicePlane.