Drug Design - Receptor - the Active Analog Approach

I spent ten years writing molecular modeling code, achieving a 10^12 to 10^17 speedup factor in Systematic Search
Written in Ansi "C", it runs on Sun, Silicon Graphics, and Dec Alpha machines. A variant of this software is sold by Tripos Associates, in St. Louis Mo. Under the name of Receptor V3.2 Receptor uses a depth first search of molecular conformation space with up to 45 degrees of freedom, Adaptive Sampling and Radial Increments in Distance Space to obtain a 95% confidence interval. Capable of Multi-processing over networked heterogenous hosts, Receptor still has no peer in its functionality. Molecules with over 10^48 conformations are routinely handled in CPU seconds. Candidates for conformational global minima are quickly produced and sorted by family for downstream analysis.