Defensive Programming - - Growing article, with links to many related topics. [Wikipedia.
Oulu University Secure Programming Group - - Goal: study, evaluate, develop means to implement and test application and system software to prevent, discover and prevent implementation level security vulnerabilities pro-actively, and via software security testing.
Secure Programming Techniques - - First installment in multipart series of excerpts from Practical Unix and Internet Security, 3rd Edition; tips and general design principles to code by to avoid security-related bugs. O'Reilly Media.
SecureProgramming.com - - Recipes for cryptography, authentication, networking, input validation, certificate, many security issues. Weblog, glossary, articles, books, links, software.