Algodoo

Uses different LAYERS
Include:
Simple train (Up/Down arrow)
5 sizes of straight tracks ( 2-10m long )
5 sizes of turn tracks ( 2x2,...,5x5m )
Cross section, Turnable secttion (for garage => WIP)
Details: Connector, Dead end

Next update:
Trains, track switch, train garage, more details

You can EDIT and UPLOAD as RESPONSE and ADD credits
(If not i warn you by comment...)