| 16 Bit Microcontroller |  | Stats | | LGPL | |
| 16-bit CPU based loosely on Caxton Foster's Blue architecture | | Stats | | LGPL | |
| 16-bit Open uRISC core Processor | | Stats | | LGPL | |
| 1664 microprocessor | | Stats | | Others | |
| 32 bit Processor | | Stats | | LGPL | |
| 4004 CPU and MCS-4 family chips | | Stats | | Others | |
| 6502VHDL | | Stats | | | |
| 6809 and 6309 Compatible core | | Stats | | LGPL | |
| 68hc05 | | Stats | | | |
| 68hc08 | | Stats | | | |
| 8-BIT HARDWIRED PROCESSOR | | Stats | | LGPL | |
| 8-bit microcontroller with extended peripheral set | | Stats | | LGPL | |
| 8-BIT MICROPROGRAMMED PROCESSOR | | Stats | | LGPL | |
| 8-bit Piepelined Processor | | Stats | | LGPL | |
| 8-bit uP | | Stats | | GPL | |
| 8051 core | | Stats | | | |
| 8080 Compatible CPU | | Stats | | | |
| A lightweight 8085 verilog implementation |  | Stats | | LGPL | |
| A-Z80 CPU | | Stats | | LGPL | |
| ae18 | | Stats | | LGPL | |
| aeMB | | Stats | | LGPL | |
| ag_6502 soft core with phase-level accuracy | | Stats | | GPL | |
| AltOr32 - Alternative Lightweight OpenRisc CPU | | Stats | | LGPL | |
| alt_ISA | | Stats | | LGPL | |
| Alwcpu - A light weight CPU | | Stats | | LGPL | |
 Amber ARM-compatible core | | Stats | | LGPL | |
| An inventory of soft processor cores | | Stats | | LGPL | |
| ao486 | | Stats | | BSD | |
| ao68000 - Wishbone 68000 core | | Stats | | BSD | |
| aoR3000 | | Stats | | BSD | |
| Apollo Guidance Computer NOR eMulator | | Stats | | GPL | |
| Aquarius | | Stats | | GPL | |
| ARM4U | | Stats | | GPL | |
| AsCPro I | | Stats | | GPL | |
| ASPIDA sync/async DLX Core | | Stats | | | |
| Atlas Processor Core | | Stats | | GPL | |
| Attiny Atmega Xmega core | | Stats | | LGPL | |
| AVR Core | | Stats | | | |
| AVR HP, Hyper Pipelined AVR Core | | Stats | | LGPL | |
| AVRtinyX61core | | Stats | | LGPL | |
| AX8 mcu | | Stats | | | |
| BiRiscV - 32-bit dual issue RISC-V CPU | | Stats | | Others | |
| bit-serial | | Stats | | BSD | |
| Brainfuck CPU | | Stats | | LGPL | |
| CBU Graduation Project | | Stats | | LGPL | |
| CF State Space Processor | | Stats | | | |
| ClaiRISC - runs 12bit opcode PIC family. | | Stats | | | |
| Classic 5-Stage Pipeline MIPS | | Stats | | BSD | |
| Codezero OpenRISC Port | | Stats | | GPL | |
| Confluence OpenRisc 1000 | | Stats | | | |
| copyBlaze | | Stats | | LGPL | |
| Cowgirl | | Stats | | | |
| Cpu Generator | | Stats | | | |
| cpu6502_tc - R6502 Processor Soft Core with accurate timing | | Stats | | GPL | |
| cpu65c02_tc - R65C02 Processor Soft Core with accurate timing | | Stats | | GPL | |
| DarkRISCV | | Stats | | BSD | |
| Data Flow Processor | | Stats | | | |
| Diogenes: Student RISC System | | Stats | | | |
| Distributed limited cores | | Stats | | LGPL | |
| ecpu_alu | | Stats | | GPL | |
| Edge Processor (MIPS) | | Stats | | LGPL | |
| Educational 16-bit MIPS Processor | | Stats | | LGPL | |
| Educational RISC Processor | | Stats | | | |
| ELM Embedded Processor | | Stats | | Others | |
| erm16 | | Stats | | LGPL | |
| Fault-Tolerant Microprocessor | | Stats | | LGPL | |
| Featherweight RISC-V | | Stats | | Others | |
| Fluid Core (A Reconfigurable Pipelined RISC processor) | | Stats | | LGPL | |
| FORTH processor with Java compiler | | Stats | | LGPL | |
| ForwardCom | | Stats | | CERN-OHL-L | |
| FPz8 | | Stats | | LGPL | |
| GPU | | Stats | | LGPL | |
| HC11 Compatible - Gator uProcessor | | Stats | | LGPL | |
| HD63701 compatible core | | Stats | | LGPL | |
| HF-RISC | | Stats | | GPL | |
| HiCoVec - a configurable SIMD CPU | | Stats | | GPL | |
| HIVE - a 32 bit, 8 thread, 4 register/stack hybrid, pipelined verilog soft processor core | | Stats | | Others | |
| HPC-16 | | Stats | | LGPL | |
| HyperMTA | | Stats | | | |
| i650 | | Stats | | LGPL | |
| i8080 compatible processor using Am29XX bit slice family and microcoded design | | Stats | | LGPL | |
| Ion - MIPS(tm) compatible CPU | | Stats | | LGPL | |
| JOP: a Java Optimized Processor | | Stats | | GPL | |
| K68 | | Stats | | | |
| KLC32 | | Stats | | LGPL | |
| Lattice 6502 | | Stats | | LGPL | |
| LEM1_9 | | Stats | | LGPL | |
| Leros-32 |  | Stats | | LGPL | |
| Leros: A Tiny Microcontroller for FPGAs | | Stats | | BSD | |
| Lightweight 8051 compatible CPU | | Stats | | LGPL | |
| Lightweight 8080 compatible core | | Stats | | GPL | |
| LocationPU | | Stats | | | |
| LXP32, a lightweight 32-bit CPU core | | Stats | | Others | B.3 |
| M1 Core | | Stats | | GPL | |
| M32632 32-bit Processor | | Stats | | LGPL | |
| M65C02 | | Stats | | LGPL | |
| MB-Lite | | Stats | | LGPL | |
| MC6803/6801 CPU | | Stats | | LGPL | |
| McAdam's RISC Computer Architecture | | Stats | | GPL | |
| MCIP open | | Stats | | LGPL | |
| MCPU - A minimal CPU for a CPLD | | Stats | | GPL | |
| microprocessor za208 | | Stats | | LGPL | |
| MicroRISC II | | Stats | | | |
| MicroSimplez | | Stats | | LGPL | |
| Mini-Risc core | | Stats | | | |
| Minimal PDP8/L implementation with 4K disk monitor system | | Stats | | LGPL | |
| miniMIPS | | Stats | | LGPL | |
| miniMIPS Superscalar | | Stats | | LGPL | |
| mips compatible barrel processor | | Stats | | LGPL | |
| Mips-FaultTolerant | | Stats | | LGPL | |
| MIPS32 Release 1 | | Stats | | LGPL | |
| MIPS32 Release 1 with support for FPU and other COPs | | Stats | | LGPL | |
| mips789 | | Stats | | | |
| mipsr2000 | | Stats | | LGPL | |
| MIPS_enhanced | | Stats | | LGPL | |
| MIX-fpga | | Stats | | GPL | |
| MMU for Z80 and eZ80 | | Stats | | BSD | |
| MPX 32-bit CPU | | Stats | | LGPL | |
| MSP430 CPU core in VHDL | | Stats | | LGPL | |
| myBlaze | | Stats | | LGPL | |
| NanoBlaze: the expandable processor | | Stats | | LGPL | |
| Natalius 8 bit RISC | | Stats | | LGPL | |
| Navré AVR clone (8-bit RISC) | | Stats | | GPL | |
| nCore | | Stats | | GPL | |
| NEO430 Processor (MSP430-compatible) | | Stats | | BSD | B.4 |
| Next 80186 processor | | Stats | | LGPL | |
| NextZ80 | | Stats | | LGPL | |
| ODESS Multicore Project | | Stats | | LGPL | |
| oks8 | | Stats | | GPL | |
| OoOPs - Out-of-Order MIPS (TM) Processor | | Stats | | LGPL | |
| OpenCores54x DSP | | Stats | | | |
| opencpu | | Stats | | LGPL | |
| OpenCPU32 | | Stats | | LGPL | |
| OpenFire Processor Core | | Stats | | | |
| openMSP430 | | Stats | | BSD | |
| OpenRISC 1000 | | Stats | | LGPL | |
| OpenRISC 1000 (old) | | Stats | | LGPL | |
| OpenRisc 1200 HP, Hyper Pipelined OR1200 Core | | Stats | | LGPL | |
| OpenRISC 2000 | | Stats | | LGPL | |
| OpenTPULike | | Stats | | LGPL | |
| P16C5x | | Stats | | LGPL | |
| pAVR | | Stats | | | |
| PDP-11/70 CPU core and SoC | | Stats | | GPL | |
| PDP-8 Processor Core and System | | Stats | | GPL | |
| Pepelatz MISC | | Stats | | LGPL | |
| Plasma - most MIPS I(TM) opcodes | | Stats | | Others | |
| plasma with FPU | | Stats | | Others | |
| Potato Processor | | Stats | | BSD | |
| PPX16 mcu | | Stats | | | |
| qrisc32 wishbone compatible risc core | | Stats | | LGPL | |
| QUARK RISK | | Stats | | LGPL | |
| r2000 Soc | | Stats | | LGPL | |
| Raptor64 | | Stats | | LGPL | |
| Reduced AVR Core for CPLD | | Stats | | LGPL | |
| Register Oriented Instruction Sets | | Stats | | LGPL | |
| rf68000 | | Stats | | BSD | |
| rf6809 8/12 bit | | Stats | | BSD | B.3 |
| RISC Microcontroller | | Stats | | | |
| risc16f84 | | Stats | | Others | |
| RISC5x | | Stats | | LGPL | |
| RISCOmpatible | | Stats | | LGPL | |
| RISCV-EC | | Stats | | LGPL | |
| RISC_Core_I | | Stats | | | |
| RISE Microprocessor | | Stats | | | |
| Rockwell PPS4-2 core | | Stats | | GPL | |
| RTF65002 | | Stats | | LGPL | |
| rtf8088 | | Stats | | LGPL | |
| RV01 RISC-V core | | Stats | | LGPL | |
| S1 Core | | Stats | | GPL | |
| S80186 | | Stats | | GPL | |
| SAP-1 NANOPROGRAMMED PROCESSOR | | Stats | | LGPL | |
| SAP-1 VERTICAL MICROPROGRAMMED PROCESSOR | | Stats | | LGPL | |
| SAYEH educational processor | | Stats | | LGPL | |
| Scarts Processor | | Stats | | LGPL | |
| small non-pipelined, 3 stage 16-bit cpu (fetch,decode,execute) | | Stats | | LGPL | |
| Small Stack Based Computer Compiler | | Stats | | Others | |
| Small x86 subset core | | Stats | | LGPL | |
| Soft AVR Core + Interfaces | | Stats | | LGPL | |
| Software Aided Wishbone Extension for Xilinx (R) PicoBlaze (TM) | | Stats | | BSD | |
| Steel Core | | Stats | | Others | |
| Storm Core (ARM7 compatible) | | Stats | | GPL | |
| SUBLEQ eForth CPU | | Stats | | BSD | |
| SXP (Simple eXtensible Pipeline ) Processor | | Stats | | | |
| system11 | | Stats | | | |
| System68 | | Stats | | | |
| T400 µController | | Stats | | GPL | |
| T48 µController | | Stats | | GPL | |
| T51 mcu | | Stats | | LGPL | |
| T65 CPU | | Stats | | | |
| T6507LP | | Stats | | GPL | |
| T80 cpu | | Stats | | | |
| TG68 - execute 68000 Code | | Stats | | LGPL | |
| TG68K.C | | Stats | | LGPL | |
| The NEORV32 Processor (RISC-V) | | Stats | | BSD | B.4 |
| The Neptune Core | | Stats | | | |
| Theia: ray graphic processing unit | | Stats | | GPL | |
| Thor Superscaler | | Stats | | LGPL | |
| Tiny Instruction Set Computer | | Stats | | | |
| Tiny64 | | Stats | | | |
| tiny8 | | Stats | | | |
| TinyCPU | | Stats | | BSD | |
| tinyVLIW8 | | Stats | | Others | |
| TMS1000 | | Stats | | LGPL | |
| TotalCPU | | Stats | | | |
| Trinary CPU "Typhoon" | | Stats | | GPL | |
| turbo 8051 | | Stats | | LGPL | |
| TV80 | | Stats | | BSD | |
| UCore | | Stats | | | |
| UoS Educational Processor | | Stats | | LGPL | |
| uRisc-V | | Stats | | Others | |
| v586 | | Stats | | BSD | |
| V6502 | | Stats | | LGPL | |
| V65C816 | | Stats | | LGPL | |
| vhdl core of IC6821 | | Stats | | GPL | |
| VLIW Processor | | Stats | | LGPL | |
| VTACH - Bell Labs CARDIAC reimagined in Verilog | | Stats | | LGPL | |
| Wishbone BFM | | Stats | | LGPL | |
| Wishbone High Performance Z80 | | Stats | | | |
| Y80e - Z80/Z180 compatible processor extended by eZ80 instructions | | Stats | | BSD | |
| YACC-Yet Another CPU CPU | | Stats | | | |
| Yellow Star | | Stats | | | |
| Z3 - The Zork CPU | | Stats | | BSD | |
| Z80 Soft Core Microprocessor | | Stats | | LGPL | |
| z80control | | Stats | | GPL | |
| Zet - The x86 (IA-32) open implementation | | Stats | | GPL | |
| Zip Cpu | | Stats | | GPL | B.4 |
| ZPU - the worlds smallest 32 bit CPU with GCC toolchain | | Stats | | | |
