• The GeomBlog
  By Suresh Venkatasubramanian
  

• Gower's Weblog
  By Tim Gowers
  

• Graph Theory blogspot
  By Shiva Kintali
  

• Machine Learning (Theory)
  By John Langford
  

Programming

• KODERS
  

• MATLAB code
  

Conferences

• A Wiki for Call for papers
  

More Academic Links

• Intractability Center@Princeton
  

• The homepage of Nearest Neighbors and Similarity Search
  

• Open Problem Garden
  

Online books (or very explanatory notes)

• Mathematical Aspects of Mixing Times in Markov Chains (pdf)
  By Montenergo and Tetali

• Computational Complexity: A Modern Approach
  By S.Arora and B.Barak

• Grinstead and Snell's Introduction to Probability (pdf)
  

• Reversible Markov Chains and Random Walks on Graphs
  By Aldous and Fill

• Notes on counting and rapid mixing
  By A.Frieze

• Saad's books
  

• Random Walks and Electric Networks (pdf)
  by Doyle and Snell

• A mini course on additive combinatorics@Princeton (pdf)
  

Misc

• CS Lounge ( CMU only )
  

• The Online Encyclopedia of Integer Sequences
  

• The MacTutor History of Mathematics archive
  

• Research Channel
  

• Cosmic Variance
  

• Association for Computing Machinery
  

• Society for Industrial and Applied Mathematics
  

• BestTechVideos