Computational Chemistry List - Software Archive of chemistry software for Unix, MS-DOS, Windows, Mac. Includes source code in most cases. http://www.ccl.net/cca/software/
Scientific Applications for Linux: Chemistry Descriptions, screen shots, licensing information, and links for over 200 chemical programs for Linux. http://sal.jyu.fi/Z/2/
Tom's Free Chemistry Software Reference Frequently-updated searchable alphabetical index of free Chemistry software. Features a search engine. http://users.ugent.be/~tkuppens/chem.shtml
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