Some applets, simple, and (maybe) useful:

Name Links Short Description
CVS passwd Browser Applet, WebStart Applet Allows you to scramble, and unscramble your cvs passwd.
Codecs Browser Applet, WebStart Applet This applet encodes, and decodes text using jakarta commons codec algorithms.
GC Calculus Browser Applet, WebStart Applet Calculates the size of the various heap segments. Entering the maximum heap size, the permanent size, the NewRatio, and SurvivorRatio, this applet calculates the size of maximum memory available to the application, the tenure, and young size. Moreover it calculates the size of the young space segments: survivor, and eden.