Io
Io, short for Io Programming Language, was created in 2002 by Steve Dekorte. Io is a prototype-based, dynamically typed programming language focused on simplicity, minimalism, and concurrency. It is used in experimental software development, educational contexts, scripting, and rapid prototyping of distributed or concurrent applications.
Qt
Qt is a cross-platform application development framework created by Haavard Nord and Eirik Chambe-Eng in 1991. It is primarily used for developing graphical user interfaces (GUIs), desktop applications, embedded systems, and mobile apps. Developers can access Qt by downloading it from the official Qt website at Qt Downloads, which provides SDKs, libraries, and documentation for Windows, macOS, Linux, and embedded platforms.