Lumail <http://lumail.org> received two patches today, one to build on Debian Unstable, and one to build on OpenBSD.
The documentation of the lua primitives is almost 100% complete, and the repository has now got a public list of issues which I'm slowly working on.
Even though I can't reply to messages I'm cheerfully running it on my mail box as a mail-viewer. Faster than mutt. Oddly enough. Or maybe I'm just biased.