I've been more actively developing PAPER, and expect to push to GitHub and publish wheels on PyPI tomorrow although it's really still not ready for a Show HN. My work there has also led me to developing some side utilities:

* a library for filesystem tree operations (and other trees, if you're clever enough swapping in components)

* a utility to identify and extract wheels from pip's cache (so that they can be dumped into other installers' caches, for example)

I also hope to return to bbbb soon, if only to make sure that it can build PAPER's wheels smoothly (and with a few other basic conveniences implemented).

Oh, and I wrote an article for LWN recently and have plans for a few more....