I spent about 10 minutes browsing your program. I was very impressed on the educational value the applets possessed. I am a student pursuing a degree in Math education and i would definately use you site to help students better understand simple geometry topics. I believe the the website interaction would be very helpful in a classroom setting.
I found a few of tha applets a bit confusing at first ,but after playing around with them for awhile they were easily manageable. I didn't find any technical problems with any of your applets.