Leaning Technologies is a company that specializes in advanced web-based software solutions. They focus on enabling the execution of complex applications and technologies directly in web browsers without the need for plugins or additional installations. Their key offerings include "Cheerp," a C++ compiler that supports various technologies such as HTML5 and JavaScript, enabling developers to convert C++ applications into web-based applications. Additionally, they provide solutions for running legacy applications on modern web browsers. Leaning Technologies aims to bridge the gap between traditional software environments and the modern web platform.