Bugzilla is a script for servers (CMS) and once is installed, it provides a bug tracker and product management interface for software or other applications.
Each project can have multiple components and each component can have its own tickets.
It to add tickets for bugs these tickets can be sorted by name, status, date. For each ticket can assign a milestone, assign it to a person from team, add keywords or tags, attachments or hyperlinks.
Bugzilla server script was created first time in 1998 for Mozilla, it doesn’t have all modern improvements keeping a classic interface, but may be a good self hosting solution for developers.