C++ based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
A fast and robust web server and application server for Ruby, Python and Node.js
A fast, powerful type checker designed for Ruby
2D game development library for Ruby and C++
OpenShot Video Library (libopenshot) is a free, open-source project dedicated to delivering high quality video editing, animation, and playback solutions to the world. API currently supports C++, Python, and Ruby.
SimpleITK: a layer built on top of the Insight Toolkit (ITK), intended to simplify and facilitate ITK's use in rapid prototyping, education and interpreted languages.
Fast Binary Encoding is ultra fast and universal serialization solution for C++, C#, Go, Java, JavaScript, Kotlin, Python, Ruby, Swift
Ruby bindings for ImageMagick
Map editor for pokeemerald, pokefirered, and pokeruby
RedGem Engine: a 3D game engine scripted in Ruby, with its own editor