Dear Sanjay
All IIT's, NIT's comes to this category. Apart from that these are the best in private colleges

• SASTRA University(Thanjavur Campus)
• Anna University
• SRM UNIVERSITY(Chennai)
• GITAM University(Visakhapatnam)
• VIT UNIVERSITY

Best colleges for what...engineering or business school..

You can consider below names -

Delhi Technological University
Anna University
PSG College of Technology
Manipal Institute of Technology (MIT Manipal)
Jawaharlal Nehru Technological University Kakinada
SRM University, Chennai - Kattankulathur Campus
SASTRA University
B.S. Abdur Rahman Crescent University
Dayananda Sagar College of Engineering (DSCE) etc.

Hope this helps!!!!