I was searching through a few city names (smaller cities) and noticed quite a few .org.in / net.in and a few .in / .co.in domains that are available.
If you come across any that you decide not to register, post them here.

I know that most only register city names with a certain population level, but here are a few to kick things off:

aburoad.in
aburoad.co.in
adilabad.co.in
aizwal.in
aizwal.co.in
akola.net.in
akola.org.in
aligarh.net.in
aligarh.org.in
allahabad.net.in
almora.net.in
almora.org.in
alwar.net.in
alwar.org.in
ambala.net.in
ambala.org.in
amber.net.in
amber.org.in