MavBiff is an X11 (GTK12) based new mail alerter. If an email message arrives in one of your files, it will toggle a button. If you press the button, the window with that message will be brought to the front.
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.