Cryptix Elliptix - Java implementation of the basic elliptic curve primitives. cryptix.org/products/elliptix/index.html
Francis Litterio - Public Key Cryptography - Mathematical description of RSA along with various implementations. Additionally links to quality cryptography resources. world.std.com/~franl/crypto.html
Hidden Field Equations Home Page - Contains information, in-depth analyses and links to references. Maintained by Nicolas Courtois. www.minrank.org/hfe
How RSA works - An elementary account of the mathematics behind the RSA cryptosystem www.muppetlabs.com/~breadbox/txt/rsa.html
RSA Cryptography Algorithm Simulate Center - Simulates the RSA algorithm in Javascript. Helps the understanding of public key cryptography. my.netian.com/~dubs37/english