I use tiddlywiki and I am very happy with it. Too bad dev has been discontinued though,
Discontinued? It has over 100 contributors, and the last stable release was two months ago ... I think it is very much alive: https://github.com/Jermolene/TiddlyWiki5
That's great news! I didn't know it was still actively developed. I played with it... criminy how many years ago did it first start? I liked it then but it was brittle and slow.
It looks great now, functionally and speed-wise. Obviously computers themselves changed a lot in that time to give the speed improvement.