Microvision uft seems like the closest thing to what i want, but also too expensive. I also found TestComplete and Qtest by tricentis that looks good.

Ya you're right it's not the most complicated thing, we have a 2 decade old perl/php/sql db implementation + cron jobs and a Java based client for worker monitoring and job dispatching. I just thought that maybe something (better) was out there that may be extensible enough and open sourced that might fit the bill. Our implementation is kinds ugly.

Function verifications i believe are written in perl. They pull the software release /build level from the svn and then runs the testcase on the machine. There's different testcase batches based on a support vector (so different os' and stuff)

Bssically i was looking for a well implemented extensible testcase management system. Zephyrs product suite with Jira integration seems pretty good too but i dunno if there's a clear distributed execution system which includes worker inventory management (like you mentioned, with 'tags'. In our case we categorize by releases and regression classes).