The most comprehensive BeOS GUI tracing tool, allowing inspection on almost all of the BeOS native objects, 309 in all right now! Clue is analogous to printf, for BeOS programmers. Clue allows you to easily view printf-like statements from several apps.
JDebug is a simple yet powerful Java package for debugging and tracing of code in environments where other tools cannot be used. The modules included in JDebug will prove particularly useful to programmers of online service development.