Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc
The flexible game engine
Shows how easy it would be to gain unauthorized access to a system
Bloat-free Graphical User interface for C++ with minimal dependencies
An iOS & tvOS Frontend for Multiple Emulators
A cross-platform, open-source, pure C game engine for mobile game
Capstone disassembly/disassembler framework
MLT Multimedia Framework
Lua Virtual Reality engine
Powerful embedded Lua Engine for IoT devices, with many components
Embeddable JSON Database engine C library
3D game engine/framework in C, with Luajit and Python bindings now
The Pi-hole FTL engine
Open-source time-series database with high-performance and scalability
Chroot, mount --bind, and binfmt_misc without privilege/setup
Dynamic Instrumentation Tool Platform
Lexbor is development of an open source HTML Renderer library
Embeddable, replicated and fault tolerant SQL engine
Distributed PostgreSQL as an extension
Retro game engine for creating games like it's 1997
An ICC-based CMM for color management
A free, high-quality, and portable font engine
A real time inference engine for temporal logical specifications
Game engine to build text adventures.