1)   MockupScreens 3.17
Sketch screen mockups and experiment interactively with your clients. Organize mockups in scenarios and quickly create wireframe of your application, before any coding has started. MockupScreens main design goals are ease of use and productivity.

 2)   JExpert 1.00
JExpert is a free test simulation engine based on the latest pattern of Sun's Java Programmer Certification. The simulator contains a large number of questions and mock exams.