Bilingua - Bilingua: your language exchange app & learning companion.
LingQ - Learn languages by immersing yourself in a world of interesting, authentic content!
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
My Language Exchange - Language Learning Community for Safe Effective Practice
Living Language - Multi-media based language learning software.
FSI Language Courses - Public domain versions of language courses from the Foreign Service Institute.