Kalka Simla Railway by Ranjeev Dubey: Perhaps the only truly Indian layout in the country of this size and this level of focus on detail. I myself had a quick visit to KSR in September - details here.
Never Enuf by Adesh Grover: A fantastic Garden Railway - one of the very few in the country.
Hercules Village by Mani Shaunik
And finally... the itty-bitty Wrightsville Port! Well, if you are reading this post, I hope you need no special introduction to this one! :P