So as I described in my previous post, I've learned a bunch of Japanese Kanji.
The cool part is that Anki stores all my reviews in sqlite - so I know over the last 2 years when I've learned a Kanji, reviewed a Kanji or forgotten a Kanji. Per millisecond.
I also know D3, so I've made a visual simulation of that data. I like to think of it as a simulation of my memory.
Take a look HERE.
I guess it looks like this but more interactive:
I've also made the tool generic, so if you happen to also have learned Kanji using Anki, there's a db uploader that'll hook your data into my visualizer - let me know if it doesn't work!