THE 300 TIBETAN RGYUD (TANTRAS) IN KANJUR & TANJUR (TIBETAN CANON)
http://www.lib.virginia.edu/small/exhibits/dead/tantras.html

The Tibetan Mahayana Canon is by far the best collection of Mahayana
shastra. These texts originated in Northern India and were later
translated into Tibetan by such notables as Padmasambhava and Marpa.
Mahayana, like Salvation Science, was a religion based upon monastic
communal life, while Hinduism was about individually visiting the
temples, worshiping, rituals, and individual asceticism. When the
Moslems invaded India, they systematically destroyed the monasteries
and their texts.

At that time, most of India was Buddhist, but, with the destruction
of the Buddhist monasteries, it immediately reverted back to a Hindu
majority. Hindu shastra survived, but most Indian Mahayana shastra
were destoyed. Luckily, the entire Canon had already been translated
into Tibetan and were in safe-keeping in Tibet. Unfortunately, due to
the theological ineptness of the masses, only a handful of the over
300 separate Tantras were ever translated into English (or even
Japanese!).

What we could find of relevance, is contained, with commentaries, in
The Tantrayudha, at http://www.salvationscience.com There is a
notable lack of translations of scriptures about Taoist Alchemy and
Mahayana Tantra. I guess nobody gives a damn, which explains why so
few get Saved from suffering. Jai Om. - Sw. Tantrasangha
http://www.lib.virginia.edu/small/exhibits/dead/tantras.html