I seem to have accumulated quite a few small objects since I started this page a few months back.
All of these are released as public domain for usage as you see fit.

As this page was getting a little unwieldy, they have been split into two categories:
Locomotives and Rolling Stock

Lineside Buildings & Road Traffic

All objects are packaged in a self-contained .zip or .7z file, and should be ready to add to your route.