Open-source code generator for Simulink/Stateflow
Java class file shrinker, optimizer, obfuscator, and preverifier
Vector drawing program for LaTeX using PSTricks
Open Utilities and/or Examples for GeneXus
C++ CASE tool, full life cycle code generator
Easily turn UML models into code
Optimized version of MVP, using annotation generics to simplify code
Another take on Android AIDL tool