The New And Improved List Of API and Third Party Apps

For the Android, don’t forget the discontinued but feature-rich WaniKani Mobile and the redder WaniKani Android apps.

Since you are adding community works under “Additional Content,” add BreadstickNinja’s 930+ kana-only words available on Anki and Excel from the second reply of this thread.

That’s all I can think of that aren’t already in the list in the OP.  Great work so far!