From Living Tonges website: "If you want to learn an endangered language online, where do you begin? We are pleased to address this topic in our latest resource, “Learn Languages Online: A Guide To Studying Indigenous, Under-Resourced and Minority Languages.”
Living Tongues Program Director Anna Luisa Daigneault wrote this report with the goal of surveying a range of apps and platforms and providing the public with a bird’s eye view of what is currently available."
Guide (in pdf) here below in "complementary materials" section.