VBus

VBus is a free, Open source bus simulator. It was written by Emka in Poland. Now development of VBus has stopped, and VBus plus plus is being worked on.

The idea behind VBus
VBus was designed as a bus simulator. The latest version A4e, has the following capabilities:
 * Proper bus physics
 * Buses with interiors
 * Passengers
 * Animated doors
 * Bus stops
 * Lighting
 * joints work
 * Bus stops

The VBus Community
There is a medium VBus community, on the VBus Forum. Here all the latest buses, maps and other files are posted.

Getting started with VBus
To start with VBus, you need to download VBus A4e from the VBus Website.