The word Agama literally translates to "that which has come down" (tradition), while Shastra means "scripture" or "manual." Unlike the Vedas, which are considered Shruti (that which is heard/revealed), the Agamas are Smriti (that which is remembered/derived).
Dedicated to Lord Vishnu. These include over 108 texts, further split into the Pancharatra (more devotional/inclusive) and Vaikhanasa (stricter, Vedic-aligned) traditions. Shakta Agamas (Tantras): agama shastra pdf