Linux4Chemistry - An up-to-date directory of Linux software for chemistry. Lists more than 100 free and commercial programs. - http://www.redbrick.dcu.ie/~noel/linux4chemistry/
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
Chemical Informatics Letters - The latest news in chemical informatics, links to relevant web sites, analysis and discussion. - http://www-jmg.ch.cam.ac.uk/CIL/index.html
QSAR Software - A QSAR (Quantitative Structure Activity Relationship) relevant link collection of 'The International QSAR Society'. - http://www.ndsu.nodak.edu/qsar_soc/resource/software.htm
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/
The OpenScience Project: Chemistry - A collection of links for Open Source scientific software projects. - http://www.openscience.org/links.php?section=7