8.1 Bhakti Movement

A pan-Indian devotional movement (with roots going back to South Indian Alvars and Nayanars of the early medieval period) that emphasised a direct, personal, emotional relationship with a personal God, often bypassing elaborate ritual and caste hierarchy, and frequently composed in vernacular languages rather than Sanskrit.

South India: Ramanuja (Vishishtadvaita philosophy), Madhvacharya (Dvaita philosophy), Basavanna (founder of the Lingayat/Virashaiva movement in Karnataka), and Vallabhacharya (Pushtimarg).
North India: Kabir (a weaver by profession, blended Hindu and Islamic ideas, composed dohas critical of ritualism in both religions), Guru Nanak (see above), Ravidas/Raidas (a cobbler-saint, emphasised social equality), Tulsidas (author of the Ramcharitmanas, an Awadhi retelling of the Ramayana), Surdas (blind poet-saint, devotee of Krishna, author of the Sursagar), Meera Bai (Rajput princess, devotee of Krishna, composed devotional bhajans), and Chaitanya Mahaprabhu (Bengal, popularised Krishna bhakti and the practice of sankirtan/congregational chanting).
Two broad theological streams: Nirguna (worship of a formless, attribute-less God — Kabir, Nanak) and Saguna (worship of God with form/attributes, e.g., Rama or Krishna — Tulsidas, Surdas, Meera).

8.2 Sufi Movement

The mystical tradition within Islam, organised into various silsilahs (orders), which stressed love, tolerance, and direct personal experience of the divine, often finding common ground with Bhakti ideas and appealing to Hindus and Muslims alike.

Chishti Silsilah: The most influential in India; founded by Khwaja Moinuddin Chishti (dargah at Ajmer, one of the most visited Sufi shrines in South Asia). Other prominent Chishti saints: Qutbuddin Bakhtiyar Kaki (Delhi), Baba Farid (Punjab), Nizamuddin Auliya (Delhi, closely associated with poet Amir Khusrau), and Nasiruddin Chiragh-i-Delhi.
Suhrawardi Silsilah: Prominent mainly in Punjab and Sindh; founded in India by Bahauddin Zakariya.
Other orders included the Qadiri and Naqshbandi silsilahs (the latter, associated with Sheikh Ahmad Sirhindi, took a more orthodox, reformist stance, notably influencing Aurangzeb's religious policies).
Sufi practices such as Sama (devotional music, closely linked to the development of Qawwali, associated with Amir Khusrau) illustrate the deep cultural cross-pollination between Sufi and Bhakti traditions.