Waapuro: A dead-simple hiragana and katakana romanization library
I put my first package on PyPI. Then I found a bug, so I made a point release to fix it! There are probably more of those lurking, which you can report over on GitHub.
Just like so many others before me, I wrote this library to scratch an itch, namely providing romanized pronunciations for Omnipresence’s WWWJDIC plugin. (Speaking of which, if I ever get that bot’s code into a less shameful state, I should put it on PyPI too…)