My old website contains an almost useful repository of homebrew junk for RPGs, sitting on a rudimentary file-based CMS that I wrote a little while back. I'm considering revamping it and porting it to something open source and database-driven so that it can have the search features and indexing that weren't practical with the data files, and so that I can start adding content to it again.

Does anyone have any experience with anything they'd want to recommend?

Articles are in two tiers of group (articles within groups within groups) and have sequence numbers within their bottom-level group. I might like to add a categorisation that would be independent of the groups. I want group- and/or category-based browsing with no time dependency, so most blogging tools are out unless I want to spend quite a lot of time writing plugins for NucleusCMS, and I daresay that is work that probably someone better than me has already done.