Here are various Sanskrit sites, viz., information on Indian scripts, etc., and a kind of catch-all Sanskrit page. Also, many Sanskrit texts (mainly in transliteration, and compressed in various ways) are available for downloading from Indology (a U.K. site) and from a site in Kyoto, Japan. Indology contains the Rig-Veda, and the Kyoto site contains the Mahabharata. There is also a link to information on Kanchi, a Sanskrit font for Macintosh.

Also, another Sanskrit site has information about the ITRANS transliteration system. At the ITRANS site, you can send off transliterated material, and in about a minute get back a nice devanagari version of your text. Click here for a sample of ITRANS format.

The Zoroastrian archives give Avestan texts and information on Zoroastrianism.

Many Old English texts (including Beowulf) are available here, along with materials for a course on Beowulf. The Old English texts can be searched by way of labyrinth, where a number of other materials (Middle English, some Latin, etc., can also be found.

This gives a listing of institutions in North America where "uncommonly taught languages" (such as Sanskrit and Avestan) are offered. Almost every language is listed here; my impression is that only English, French, German, and Spanish are omitted (and one can find "Old" stages of all four).