There are several bug tracking software products available out there, yet none of them offer the functionality of JIRA.
Developed by the fastest growing software companies in Australia, this software offers plethora of features and is completely customizable to your needs. Tracking bugs and other issues that can present themselves during large scale (or small) projects can be an overwhelming task, and one that few development teams can achieve effectively. Over 4000 companies are now using JIRA.
JIRA has a clean interface which makes it easy to use even for novices. It is configurable and runs on most platforms and can be integrated with other systems (eg. RSS, XML, email). It offers statistics, powerful security, full text search, and is web enabled. You can use it to map your business processes and create reports, charts, and custom workflows.