Sun Community Source Licensing (SCSL): picoJava - http://www.sun.com/software/communitysource/processors/picojava.xml 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.
Open Source Soft Microprocessors - http://www.ddj.com/linux-open-source/197800817/ 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.
The Freedom CPU - http://f-cpu.seul.org/ F-CPU, mainly dedicated to pure SIMD superpipelined 64-bit RISC CPU, and the sources. Open Source, GPL.
E-Risc - http://www.geocities.com/SiliconValley/Chip/5014/ Project to design and implement scalable 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.
CMOSexod.com - http://www.cmosexod.com/ For advanced hobbyists: share free microprocessor and DSP IP cores written in Verilog or VHDL.
STM - http://www.asahi-net.or.jp/~uf8e-itu/ 32-bit, 2-way superscalar RISC processor, designed in a HDL. Source downloads. This one is actually working.
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