ACM SIGACT Special Interest Group on Algorithms and Computation Theory, the ACM special interest group for Theoretical Computer Science. Site has membership information, meetings, reports and a newsletter for members. http://sigact.acm.org/ More Info
Dictionary of Algorithms, Data Structures, and Problems A dictionary of algorithms, algorithmic techniques, data structures, and archetypical problems, with related definitions. Many entries have links to implementations, tutorials, and bibliographical references. http://www.nist.gov/dads/ More Info
