VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
foobar2000 - An advanced freeware audio player for the Windows platform.
Lingvist - Lingvist helps you take your foreign language skills to the next level with a broad selection of exercises and lessons.