Maximus - Image-Line's advanced compressor, limiter and maximizer plugin.

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.

Complexer - Cross-platform, multi-stage dynamics processor.

Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.

Fabfilter Pro C - High-quality compressor plug-in for the most demanding engineers

Lingvist - Lingvist helps you take your foreign language skills to the next level with a broad selection of exercises and lessons.