itch.io

Focused on imparting a skill, lesson, or piece of information to its player that would be helpful to them in other aspects of life, such as a faster typing ability or knowledge about a period in history.

Resources relating to or for building Graphical User Interfaces (Commonly called GUIs)

Products that involve or comprise source code, including programming games; does not refer to products with their own source code available, open source or not.