The last of the known reproducible integrity issues in PDOS/386 was fixed about a day ago, and as a result, PDOS is now nominally stable, and is self-hosting such that it can rebuild both the OS and the tools (including GCC 3.2.3).
This project was started in 1994.
Available at http://pdos.org
I also had an idea to include a commercial product of mine (capitalg) on the distribution, and if someone else has something they wish to sell, maybe I can include that too.