I should have posted this long ago when we completed the first few simulations, but I suppose it is better late than never:
http://www.simbucket.com now has over 40 free simulations and games for science students!
Inspired by the great free collection of Java/Flash simulations at http://phet.colorado.edu, we have found that Construct 2 is a natural fit for physics simulations. We hope you find them useful. Enjoy!
for the Conant High School Physics Teaching Team