Entomologist is a desktop client for working with various bug trackers. Currently Bugzilla, Mantis, Trac, and Launchpad are supported, with more under development.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.