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MHT CET is an entrance exam for taking admission to engineering colleges in Maharashtra. As you have scored only 60 percentile, it is hard to get admission in any government institute in Maharashtra. But, you can surely get admission in private engineering colleges. These are some of the colleges you can apply to -
Shree Chanakya Edu. Society's Indira School Of Business Studies, Tathwade
MAEER's M. I. T. College of Engineering, Kothrud, Pune
Don Bosco Institute of Technology, Mumbai
Durgadevi Saraf Institute of Management Studies, Malad (W), Mumbai
Maharashtra Institute of Technology, Kothrud, Pune
Shri Ramdeobaba College of Engineering and Management, Nagpur
Vidyalankar Institute of Technology, Wadala, Mumbai
Modern Education Society's Neville Wadia Institute of Management Studies & Research, Pune
Atharva Educational Trust, Atharva Institute of Management Studies, Mumbai
Sinhgad Institute of Management, Pune
Gurunanak Institute of Management Studies, Mumbai
Department of Management Studies, North Maharashtra University, Jalgaon.

You cannot get admission in CSE in any of the NITs or IIITs ,but it's also based on your category. For open category there are no chances to get into NITs or IIITs. If you are SC or ST category you may get a seat.
Especially by Josaa you will surely not get a seat , sometimes you may get a seat through CSAB special rounds .
You may get seat in least branches.But if you are Home State student of particular NITs or IIITs or GFTIs you may get a seat .
You will surely not get any seat in Josaa rounds . So you need to opt for CSAB special rounds so that you may get seat in some NITs or IIITs or GFTIs for some branches . CSE is not a sure thing but sometimes you will get due to luck. It depends on the number of persons who have more rank than you appearing in CSAB rounds and number of seats left in those colleges in those particular branches .You'll have 3 options now:
Settle for some other engineering college and go ahead with its curriculum.
Settle for some other college and work for both your sem and next JEE prepration.
Join in some long term institutes and prepare well this time and give next JEE.