Project to design and implement scaleable RISC microprocessor for embedded applications. All architecture and source code to be released under GNU General Public License, or a slightly modified version that includes hardware, not only software.

32-bit, 2-way superscalar RISC processor, designed in a HDL. Source downloads. This one is actually working.

F-CPU, mainly dedicated to pure SIMD superpipelined 64-bit RISC CPU, and the sources. Open Source, GPL.

For advanced hobbyists: share free microprocessor and DSP IP cores written in Verilog or VHDL.

Free licensing of soft microprocessors lets designers easily modify FPGAs and gives greater visibility into architectures; explains implications of associated licensing models. Dr. Dobb's.

A core is the central component of a processor or controller chip. Chips using picoJava core are well suited for consumer electronic products running Java programs. Sun Microsytems.