Well, apart from NCERT textbooks (which are of, let me tell you, prime importance), many books at there that might be useful.
H.C. Verma is good and enough for physics.
Make a formula sheet. It should contain all the formulas of 11th as well as 12th.
O.P. Tandon which is made especially for NEET students.
After learning for NCERT, practice problem from MTG papers. If you have time left, Truemens Biology is really good. It will interest you a lot.
Also, coaching notes are a major source of your preparation along with NCERT.
Hope this helps.
Here is a list of the best sources of books and publishers that you can use for preparing for NEET for each subject. You can use any of these according to your requirements along with NCERTS.
BIOLOGY- NCERT Biology Class XI and Class XII textbooks
Biology Vol 1 and Vol 2 by Trueman
Objective Biology by Dinesh
Objective Botany by Ansari
Pradeep Guide on Biology
GR Bathla publications for Biology
CHEMISTRY- NCERT Chemistry textbooks for Class XI and XII
Physical Chemistry by OP Tandon
ABC of Chemistry for Classes 11 and 12 by Modern
Concise Inorganic Chemistry by JD Lee
Dinesh Chemistry Guide
Practise books by VK Jaiswal (Inorganic), MS Chauhan (Organic) and N Awasthi (Physical)
NCERT Physics Class XI & Class XII
Concepts of Physics by H. C. Verma
Objective Physics By DC Pandey
Fundamentals of Physics by Halliday, Resnick and Walker
Fundamental Physics by Pradeep
Problems in General Physics by IE Irodov
Best of luck
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