Buddy - The simplest CI/CD tool ever made, acclaimed by top developers worldwide. It uses delivery pipelines to build, test and deploy software. Pipelines are created with over 100 ready-to-use actions, that can be arranged in any way.

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.

CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.

Lingvo TV - Learn languages while watching movies on Netflix.

Semaphore - Semaphore is a fully managed, high performance testing and deployment solution for your company. A Continuous Integration tool.

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