||ICON-EDiT is a semiempirical
molecular orbital package for the study of molecular properties, including excited states ("EDiT"), and structure optimization ("GOP"). A solid state package "BICON-EDiT" is also available. Based on original work of the Roald Hoffmann group the present version with many additions and improvements has been developed by Gion Calzaferri, Bern, and his group. It can be downloaded from Calzaferri's homepage. Several packages for Windows-OS's and Unix(Linux) OS's are offered under GNU open source declaration. In addition an excellent tutorial "Manual.pdf", many worked examples, and most of the recent publications of the group, pertinent to EHMO, can be obtained for free.