CNA is a cross-platform multi-language XNA 4.0 API ecosystem powered by a high-performance C++ core, featuring 25 renders and 10,000+ pixel-perfect integration tests

A COBOL-74 compiler for MVS 3.8j, emitting S/370 assembler. Native VSAM support, which IBM's ANS COBOL does not have.

80486-class CPU with integrated floating-point in SystemVerilog

8086 FPGA core running original microcode

A simple tool for coordinating several AI agents.

Tabby - a PowerPC distribution of Haiku for Power Mac G3/G4. Boots to the desktop on real hardware: PowerBook G4, iBook G4, iMac G3, Power Mac G4. Sound, WiFi, ethernet, USB, native NVIDIA modesett…

XenOS NT-compatible Operating System

An NT-inspired hybrid microkernel operating system written in Zig. Minimal kernel, user-space system servers, PE/ELF support, and WOW64 compatibility.

An operating system with a monolithic NT-like kernel

PELoader is a WinAPI kernel/user call emulator, able to run on POSIX platforms (Linux). Currently, PELoader supports only a small subset of kernel32.dll functions.

The financial transactions database designed for mission critical safety and performance.

Chat engine designed for millions of users. System design based on microservice architecture. Implementation based on cloud agnostic technologies. Configurable, observable, containerized and runnab…

C++11 cross-platform migration of the Eigen Compiler Suite backend, and C frontends and libc/m for Eigen

MicroNT 3.65 (Cloud Edition)

Host-native S/370 (MVS 3.8j) C cross-toolchain: cc370 driver + as370/ld370/ar370

Open-source, self-hostable alternative to Vercel, Netlify, Railway and Heroku. Self-host any app on your own servers in minutes.

FNA - Accuracy-focused XNA4 reimplementation for open platforms

Windows CE 2.11 for N64!

Retro ASCII-style UI for Avalonia — bringing classic text-mode interfaces to modern apps.

A Minecraft server written in COBOL

FRANK OS - The RP2350 Operating System

A UNIX-like kernel for the i386 architecture

An experimental text editor based on Scintilla and Turbo Vision.

Tiny Linux for Vintage Computers

⚙️ C99-compatible multipass compiler written in TypeScript with GCC extensions support. Features a handcrafted left-recursive parser, custom IR, SSA-based optimizer, and a full frontend/backend pip…

Remake of an MSDOS game for the ESP32 microcontroller using the ST7789 / ILI9341 LCD display and a joystick module.

Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)

A direct-style effect system in Scala 3 that tracks effects using context parameters

[Go]Minimal event sourcing/CQRS library using protocol buffers for commands, events and states.