This site, run by Manfred Kropp of the University of Mainz, contains resources on computing and Ethiopian languages, in particular Ge’ez and Amharic. Resources include documents on transliteration standards; unfortunately, the link to fonts is broken. The ultimate goal of the project is to create an electronic database of texts in Ethiopian languages, including the Axumite inscriptions, of particular interest for Late Antique religions. Several texts in Ethiopian church history in Amharic are already available.
Unicode fonts in Ethiopic are available here: