Glyphtracer takes a picture of several letters. It detects individual letters and allows the user to tag them to Unicode code points. These are then vectorized and passed to Fontforge for finalization.
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.