ASFTagApp is a tag editor for files in the Advanced Systems Format (also known as ASF for short). ASF is Microsoft's proprietary audio/video container format, typically used for streaming media.
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.