Algorithms
Ciphers, Electronic Cash, Esoteric, Message Digests, Public Key, Counterpane Labs: Publications, Cryptix Standard Cryptographic Algorithm Naming, Cryptography, Security and Linux, Forum for Encryption Systems and Algorithms, General Hash Function Algorithms, Grotex Lab. - Complex calculations systems, Kremlin by Mach 5 Software, Neil Johnson's Cryptography Site, North American Cryptography Archives, SSH and Cryptographic Algorithms
Books
A Course in Number Theory and Cryptography, Algebraic Aspects of Cryptography, An Introduction to Cryptography, Applied Cryptography, Codes and Ciphers, Coding Theory and Cryptography, Contemporary Cryptology, Cryptography and E-Commerce, Cryptography book recommendations, Cryptography for Visual Basic
Events
Past Events, CHES, e-gate Open 2005, ECC 2005, IACR Calendar of Events in Cryptology, Mathematical Problems and Techniques in Cryptograp, MoraviaCrypt '05, WEWoRC 2005
Historical
A Cryptographic Compendium, Andy's Enigmatic Web Page, Bletchley Park, Enigma Cipher Machine by Tony Sale, German ENIGMA Cipher Machine - History of Solving, The TwinTrees Enigma Machine, USS Pampanito - ECM Mark II
People
Spafford, Gene, Alfarez, Abdul Rahman, Anderson, Ross, Barreto, Paulo, Bellare, Mihir, Bellovin, Steven, Biham, Eli, Blackburn, Simon, Blaze, Matt, Bleichenbacher, Daniel, Blum, Manuel
Programming Libraries
Applied Cryptography Code, BeeCrypt, Botan, BSAFEeay, Catacomb Cryptographic Library, Cryptlib Encryption Toolkit, Crypto++, CTC, CypherMath - Cryptographic Math Package, Dragonate Technologies Ltd.
Research Groups
Cambridge Univ's Computer Security Group, COmputer Security and Industrial Cryptography, Cryptography at Microsoft, ECRYPT, Florida State University, Horst Görtz Institute for IT-Security, IBM Research: Cryptography Group, Indian Statistical Institute, Kolkata (Calcutta), , Information Security and Cryptography: ETH, Zurich, Macquarie University, Australia
Theory
Bibliography on Secret Sharing Schemes, Boolean Function Nonlinearity, Chaffing and Winnowing, Foundations of Cryptography, Index of Cryptography Papers Available Online, Paul Garrett: Crypto and Number Theory
Cryptography Developments in India
Call for papers, Companies, Jobs, Government Sites, Nonprofit Organizations, Researchers, Research Groups, University Courses
Cryptology Research Society of India
Conducts annual conference INDOCRYPT and National workshop on Cryptography. Also promotes research activities in cryptology and security in India.
International Association for Cryptologic Research
Conducts annual confs Crypto, Eurocrypt, Asiacrypt, PKC, CHES. Publishes Journal of Cryptology. Site has links to Calendar of events and maintains famous E-print server.