Bugzilla is nowadays widely used in the bug tracking world. But only 10 years ago, it was a small project on the Netscape community.
It first release was 10 years ago and run under Oracle (“it cost too much”) and Kiva (“$35,000 at the time”). And on 26th August 1998, Bugzilla could run freely (under Apache and MySQL).
Long live Bugzilla!