Wikipedia Overview of how to enable complex text support for Indic scripts.
Sanskritweb fonts page Good compilation of some of the most popular fonts for classical and Vedic sanskrit and other languages of India. Includes TrueType, PostScript Type 1, Unicode and OpenType fonts.
Omkarananda Ashram Provides several popular fonts, including Sanskrit 2003, which is Unicode-compliant.
John Smith's Home Page Provides a variety of useful fonts for Unicode and for older legacy encodings such as CSX, CSX+, CARB, etc.