allspice is a set of Java libraries that allow you to define and implement a language that runs on top of the JVM. The packages define a YACC-like grammar and an underlying high level programming abstraction. One need never know about JVM internals to implement a new language. In addition, these compilations can be "on the fly". You can compile and execute without an intermediate class file.
GCC for SPARC Systems extends GCC to be able to use the optimizing Sun Code Generator for SPARC systems. The compiler commands are the same as GCC. All of the GCC command-line options are available. Programs compiled with GCC for SPARC Systems follow the same ABI as programs compiled by GCC. You can mix and match objects compiled with GCC for SPARC Systems and objects compiled with GCC.
Faust AUdio STreams is an expressive functional programming language for realtime audio signal processing. The Faust compiler translates DSP specifications into efficient C++ code. A variety of platforms and plugin formats are supported. A single Faust specification can be used to easily generate JACK and ALSA applications, as well as LADSPA, MAX/MSP, PD, Q, SC, and VST plugins. In addition to C++ code, the Faust compiler can also generate SVG block-diagram representations as well as XML descriptions.
The Java Exorcist is a simple Java syntax extender. By default (with no extensions), it only compiles standard Java code, but with each extension to Exorcist a new Java language construct can be defined or redefined. The Exorcist preserves line numbering at runtime and at compile-time. It can be invoked on the command line and through an ant task.