Top C++ GitHub Repositories & Open Source Projects (2026)

PlayStation 5 emulator for Windows, Linux and MacOS

An Open Source Machine Learning Framework for Everyone

LLM inference in C/C++

Cross-vendor 3D Gaussian Splatting trainer - video to splat to mesh, Vulkan or CUDA.

OptiScaler bridges upscaling/frame gen across GPUs. Supports DLSS2+/XeSS/FSR2+ inputs, replaces native upscalers, enables FSR-FG/XeFG on non-FG titles. Supports Nukem mod for DLSSG-to-FSR3 FG.

A native Material 3 music player for Linux. YouTube Music, local audio, synchronized lyrics, and Noctalia theming.

Port of OpenAI's Whisper model in C/C++

Strix Halo inference engine. Qwen Flash Next Q4_K_XL: 1,628.52pp, 59.41tg single user, 157.22 tok/s 8 users; Qwen27B Q4_K_XL: 656.33pp, 70.56tg tok/s single user with DFlash2

Intrinsic Core™ provides an open, local runtime, SDK, and hardware agnostic, real-time control framework for industrial robotics.

DuckDB is an analytical in-process SQL database management system

Android port of RPCS3 for ARM64 devices. From one of the founders of ARMSX2: jpolo1224

Proof that a toys-to-life game can be recompiled. A native PC build of LEGO Dimensions, made by statically recompiling the Xbox 360 release: unlocked FPS, mod's, DLC's, SDL_GameControllerDB, multilingual support and a real or emulated Toy Pad. Public demo build, bring your own dump.

Atmosphère is a work-in-progress customized firmware for the Nintendo Switch.

Self-hosted game stream host for Moonlight.

ClickHouse® is a real-time analytics database management system

RTX Remix renderer for GTA2

A local inference engine for Apple silicon, built around the model.

Scrolling column tiling for KDE Plasma

A set of performant RDNA/HIP patches against llama.cpp focusing on high speed inferencing with numerics assurance

Self-developed dual-mode Bluetooth stack in standard C++. Cross-platform for Windows, Android, Linux and RTOS. Modular design with thread-pool scheduler. Inter-module message delivery, serial execution to reduce locks. Features HCI, L2CAP, QoS, extended flow spec, packet validation and state machines. Support feature trimming for embedded & PC.C.