hii Nishu

i would like to say the best colleges in term of quality of education as there are the good colleges which are not under DDU also .

i m providing both the colleges under DDU and not under DDu please find the below 

DEEN DAYAL UPADHYAYA GORAKHPUR UNIVERSITY - [DDU], GORAKHPUR

AKHILABHAGYA MAHAVIDYALYA, GORAKHPUR

D.A.V. P.G. COLLEGE, GORAKHPUR

DIGVIJAI NATH POST GRADUATE COLLEGE, GORAKHPUR

SARASWATI DEVI MAHAVIDYALAYA NANDAPAR, GORAKHPUR

hope this helps