Description: GeoGebra is free and open-source dynamic mathematics software for all levels of education. It combines geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. It can be used to teach math from elementary through university level.
Type: software
Pricing: Open Source
Description: RetroArch is an open-source, cross-platform frontend for emulators, game engines, video games, media players and other applications. It's designed to be fast, lightweight, customizable and extensible.
Type: software
Pricing: Free