LEGO® Train Resources
You will find some free downloads and links to some great LEGO® Train modeling resources here.
Links to various LEGO® resources:
L-Gauge.org - L-Gauge is an information resource for the LEGO® model train community.
BrickLink - A great source to get parts for all your MOCs.
EuroBricks Train Forum - A great place to chat trains with folks from around the world.
New Elementary - LEGO® Parts blog with tons of great ideas for creative parts usage.
Rebrickable - User created MOCs and collection tracking. Even includes options to see what you can build with your collection.