Hello Manish, here are list of best 20 colleges of South India-

1. Indian Institute of Technology Madras
2. Indian Institute of Technology Bombay
3. Indian Institute of Technology Kharagpur
4. Indian Institute of Technology Delhi
5. Indian Institute of Technology Kanpur
6. Indian Institute of Technology Roorkee
7. Indian Institute of Technology Guwahati
8. Anna University
9. Jadavpur University
10. Indian Institute of Technology Hyderabad
11. National Institute of Technology Tiruchirappalli
12. National Institute of Technology Rourkela
13. Vellore Institute of Technology
14. Institute of Chemical Technology
15. Indian Institute of Technology Indore
16. Birla Institute of Technology & Science -Pilani
17. Indian Institute of Engineering Science And Technology, Shibpur
18. Indian Institute of Technology Bhubaneswar
19. Indian Institute of Technology Patna
20. Jamia Millia Islamia