Typhoon is a freely available relational database management system for
the UNIX and OS/2 environments.
It was abandoned by its original creator in the 1997. It was then picked up and updated to work on modern compilers by Kaz Kylheku in 1999. It has since been revived on GitHub.
Thomas B. Pedersen, Kaz Kylheku
AIX, HP-UX, Linux, Solaris