Undum : A client side framework for hypertext interactive fiction games
YAML : A modular CSS framework for truly flexible, accessible and responsive websites
Beego : An open source framework to build and develop your applications in the Go way
Vue Native : Vue Native is a framework to build cross platform native mobile apps using JavaScript
LÖVE is a framework for making 2D games in the Lua programming language. LÖVE is totally free, and can be used in anything from friendly open-source hobby projects, to evil, closed-source commercial ones.