jSuspect

 - properly installed Java Runtime version 1.5.x (also known as 5.0)  ; "java  -version" should work on the command line 

Client

 - web browser with enabled Java plugin

The jSuspect-client and the underlying Thinlet gui toolkit are assumed to run even under the Microsoft JVM-plugin as both have no dependencies on newer Java versions. The appletīs total size is just 90kb !