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Cloud SQL handles your database ops end to end, so you can focus on your app.
Jidgen is an easy-to-use, but powerful Java-based id generator. It uses templates for automated id generation and optional collision detection to avoid duplicate ids.
The 'jpwgen' program is a Java-based password generator whose functionality resembles the popular 'pwgen' program. The *nix based version of 'pwgen' is available at http://sourceforge.net/projects/pwgen/.
S/Key - OTP Generator for J2ME architecture. An RFC2289 compliant One-Time Password generator for mobile phone supporting Java language. It uses MD4 and MD5 hash algorithms.
PDApass is a one time password authentication system, designed using a Palm Pilot as a
password generator, with a PAM module to allow there server to perform the authentication.