The Bhairava Tantras claim there are 64 main Tantras. They are grouped into three schools based on the "Kula" (hierarchy of the Goddess):
The "index of tantra" is ultimately a bridge between the ancient palm-leaf manuscript and the modern PDF. It represents the human desire to categorize the "uncategorizable"—the radical, often transgressive wisdom of the Tantric path. index of tantra
The metaphysical foundation—understanding the nature of reality, the soul, and the divine. The Bhairava Tantras claim there are 64 main Tantras