Bugzilla is a open-source Bug tracking tool. Many companies are using this open source tool for managing the software development process.
After a long break finally Bugzilla project announced a new version of bugzilla 3.0 with some cool features like:
mod_perl support for greatly-improved performance
Create and Modify Bugs by Email.
See the features in detail here.
I am using Bugzilla 2.0 for the last one year and found it as an interesting bug tracking tool. Before this I was using Mercury Test director to track the bugs.
Now we will also upgrade to this new version soon and will enjoy the new features.
You can download the new version at Bugzilla 3.0 download.