Sumadhur, here is a list of few good engineering colleges in South India for Computer Science Engineering--

IIT MADRAS

VELLORE INSTITUTE OF TECHNOLOGY, VELLORE

AMRITA SCHOOL OF TECHNOLOGY, COIMBATORE

NIT TRICHY, TIRUCHIRAPALLI

NIT ANDHRA PRADESH

GITAM INSTITUTE OF TECHNOLOGY, VIZAG

NIT SURATHKAL

IISc, BANGALORE

NIT CALICUT

RAJIV GANDHI INSTITUTE OF TECHNOLOGY, KOTTAYAM

If you want to know more about the colleges good for CSE in India, you can visit this link

https://engineering.careers360.com/colleges/list-of-computer-science-engineering-colleges-in-india