flight simulator x

M/M/1 Solver & Simulator solves and simulates the M/M/1 queuing system.

Pretty cool 3D lower level AI simulator. There is a food chain

Ensure success in SCEA with Whizlabs' Simulator

EKTS is a simulator for designing Electromechanical Systems.

Prepare for PMI certification test with an exam simulator

PLC training - PLCTrainer CBT, tutorial, logic simulator.

Virtual piano, guitar/banjo/mandolin, hammered dulcimer simulator & note mapper

Router simulator for CCNA students & engineers, includes free exam lab

Ebook on using a full swing golf simulator

CertExams.com simulator provides router console and many lab exercises for CCNA.