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: WikiLinks is a free, open source wiki software that allows users to easily create and collaborate on wikis. It has a simple, intuitive interface making it easy for anyone to contribute content.
Type: software
Pricing: Open Source