wacky-tracky is a modern task tracking application that follows open standards and supports tags, subtasks, and more. It includes tags, due dates, and unlimited levels of sub-tasks.
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.