RANGE: produce random genetic transcription networks in the NEMO language, which when compiled outputs models in Systems Biology Markup Language. Generate synthetic microarray data, or use NEMO alone to SBML-ize a network, or visualize it in cytoscape.
lilpM32 is a MIPS-like processor designed in Logisim, assembler program and documentation for them.
Complete assembler and fully functional instruction set with I/O and subroutines features allow to write full-blown complicated programs.