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Top 21 C++ Assembly Projects
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less_slow.cpp
Playing around "Less Slow" coding practices in C++ 20, C, CUDA, PTX, & Assembly, from numerics & SIMD to coroutines, ranges, exception handling, networking and user-space IO
Thanks, appreciate the gesture :)
Traditional SWAR on GPUs is a fascinating topic. I've begun assembling a set of synthetic benchmarks to compare DP4A vs. DPX (<https://github.com/ashvardanian/less_slow.cpp/pull/35>), but it feels incomplete without SWAR. My working hypothesis is that 64-bit SWAR on properly aligned data could be very useful in GPGPU, though FMA/MIN/MAX operations in that PR might not be the clearest showcase of its strengths. Do you have a better example or use case in mind?
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JetBrains
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ChrysaLisp
Parallel OS, with GUI, Terminal, OO Assembler, Class libraries, C-Script compiler, Lisp interpreter and more...
I chuckled at "recovering sexp addict". What possible risk is there in over-indulging in sexp?! I simply don't see it.
Speaking of unconventional lisps, I enjoyed this recently:
https://github.com/vygr/ChrysaLisp/blob/master/docs/lisp/lis...
from Chris Hinsley, author of the (very) cool Chrysalisp operating system. Same author who wrote this in 1995:
http://www.uruk.org/emu/Taos.html
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rgbds
Rednex Game Boy Development System - An assembly toolchain for the Nintendo Game Boy and Game Boy Color
I'm currently learning assembly programming for the original Nintendo Game Boy handheld. There is an actively maintained cross-platform toolchain[0] (a few actually, but I believe I'm using the most common one), and the instruction set is very simple (it's a subset of the Z80) so it's not overwhelming.
The tooling is actually outstanding – from within VS Code I'm able to build my ROM, launch it in an emulator, and even remotely debug it using VS Code's debugger.
I started by following along with a tutorial[1] where you follow along and build a couple games, then moved on to working on my own little project. It has been extremely fun and rewarding so far.
[0]https://rgbds.gbdev.io
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nyxstone
Nyxstone: assembly / disassembly library based on LLVM, implemented in C++ with Rust and Python bindings, maintained by emproof.com
Another good replacement for capstone/keystone based on LLVM is nyxstone https://github.com/emproof-com/nyxstone
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Assemble-Them-All
[SIGGRAPH Asia 2022] Assemble Them All: Physics-Based Planning for Generalizable Assembly by Disassembly
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atmega328p-oled-asm
An AVR assembly project for playing any video on an OLED display using ATmega328P and an SD card.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ Assembly discussion
C++ Assembly related posts
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Let's Learn x86-64 Assembly Part 0 – Setup and First Steps
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Bogus Software
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Nyxstone: An LLVM-based (Dis)assembly Framework
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Nyxstone: Replacement for capstone/keystone based on LLVM
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Disassembler for x86-64 implemented from scratch in C++
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Nearly all Nintendo 64 games can now be recompiled into native PC ports
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Chrysalisp: Parallel OS with GUI, Terminal, OO Assembler, C-Script and Lisp
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A note from our sponsor - Sevalla
sevalla.com | 1 Sep 2025
Index
What are some of the best open-source Assembly projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | less_slow.cpp | 1,841 |
| 2 | thor-os | 1,711 |
| 3 | ChrysaLisp | 1,659 |
| 4 | rgbds | 1,477 |
| 5 | EU4dll | 1,110 |
| 6 | Astro8-Computer | 847 |
| 7 | inline_syscall | 709 |
| 8 | java_grinder | 506 |
| 9 | nyxstone | 381 |
| 10 | Assemble-Them-All | 172 |
| 11 | b2 | 97 |
| 12 | CTAsm | 78 |
| 13 | peakperf | 70 |
| 14 | kobo-mods | 59 |
| 15 | GodsEyeView | 55 |
| 16 | MyDisassembler | 31 |
| 17 | FluxedOS | 22 |
| 18 | Corth | 20 |
| 19 | Kite | 19 |
| 20 | morphiOS | 7 |
| 21 | atmega328p-oled-asm | 2 |
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