Actually, these constraints meant lots of efforts because each couple browser/platform owns several bugs compared to the theorical implementation of the Java Virtual Machine and the Abstract Window Toolkit.
My work has been referenced several times in Dr. Rzepa's work, for example in the Java repository at Imperial College, and also in talks like The Internet as a Computational Chemistry Tool.
I could also find links at the University of Fribourg, on an Italian reference for University tools, on a spanish chemist's page, or at the University of Florence.
Quick, I want to see the applets!
If your browser enables Java, have a look at :