It supports Unicode and can export work for camera-ready copy or in HTML or TEI form. Available at the same site is Multikey, a shareware Greek font utility. The Stoa - stoa.org has put together a small directory of internet resources useful for developing electronic texts Anaxiphorminx , a metrical font for the Macintosh, created by Ilja Leonard Pfeijffer at Leiden University. Full instructions on the site. Antioch , keyboard and Unicode font utility for Word 97 and 2000 - Greek, Hebrew and Coptic.
Many more packages are available for download from other sites.
If that site is busy, try the one at Imperial College .