Description: Duolingo is a free language-learning platform that offers over 100 total courses across more than 30 languages. The bite-sized lessons make it easy to learn a new language through fun, quick activities on your phone, tablet, or computer.
Type: software
Pricing: Freemium
Description: GeoSurf is a free geographic information system (GIS) software for mapping and analyzing spatial data. It provides tools for creating interactive maps, performing spatial analysis, managing geographic datasets, and sharing map applications.
Type: software
Pricing: Open Source