Vaishnavism: This is one major tradition within Hinduism focused on Lord Vishnu (and his associated avatars) as the Supreme Being. It played an important role during Bhakti movement.
Sant Mat: This refers to a loosely associated group of teachers that became prominent in the Indian subcontinent from about the 13th century. Their teachings are a synthesis of Hinduism and Islam, but are based on inward loving devotion towards a divine principle.
Ramananda: A 14th-century Vaishnava devotional poet sant, in the bhakti movement, Ramananda is considered the pioneer of the Bhakti movement in northern India.