Similar to Duolingo
Good audio-based app
Expensive
Best checked out at your local library in CD form
Best found at your local library
Has some endangered and indigenous languages
Best found at your local library
Widest variety in African and English as a Second Language options
Exclusively for Mandarin
Has multiple starting languages to learn Mandarin in
Also exists
Helps you select journals for article submission and avoid predatory journals
Helps students choose non-predatory journal articles during research
Estimator: estimates how long an activity will take
Compiler: takes a chunk of text and turns it into a list of tasks