Camera Simulator

[AcadieLibre]

This may be handy for those exploring using the manual mode or aperture/shutter modes. It does have some issues compared with real life usage of a DSLR but overall fairly accurate but not exact.

SLR Camera Simulator | Simulates a digital SLR camera (http://camerasim.com/camera-simulator.html)

[Iguanasan]

This is really cool. Funny, I just found this myself and was going to post it but thought I should check to see if anyone beat me to it. WTG, A.L.