There’s also a wiki of resources that the community has ammassed (it’s not only about vocab):
Warning, the wiki is quite long
For example the Anki decks should be very useful.
I’m using the “Core 10K breakdown by WaniKani level” (it’s heavy, in many ways, but it’s perfect in my opinion). I’ve also used Torii in the past and many like it (it’s a solid program, and free).
Other than that I don’t know, I like the WK vocabulary.