General TCS Stuff

• Theoretical Computer Science Cheat Sheet

Quantum Computing

• Qubit.Org

Computational Learning Theory

• LearningTheory.Org

Combinatorics and Graph Theory

• A list of Open Problems
• More Open Problems
• Graph Theory with Applications

Computational Geometry

• Open Problems in computational geometry

Algorithms and Complexity

• ACM SIGACT
• Electronic Colloquium on Computational Complexity
• The Stony Brook Algorithm Repository
• Lance Fortnow's Weblog
• Dictionary of Algorithms and Data Strutcures

Cryptography

• Cryptography Resources

Semidefinite Programming

• SDP Surveys

Books

• Graph Theory with Applications
• Handbook of Applied Cryptography