[ednico]

Logseq is one I highly recommend: http://logseq.com/ Outliner, local file storage, API plugins, todo's and loads more. On top of everything, it is free.

[pps]

> it is free

I would like to point out that this is temporary, for people who don't want to pay at all for note taking https://discuss.logseq.com/t/what-is-logseqs-business-model/...

(And yes, Logseq is great, couldn't agree more)