Numeracy
PopSQL
Redash
SQL School
Slack SQL
DrawSQL
LunoDB - Modern Database Software
Paul Gres
CleverDeck
Duolingo
Mondly
Mochi
SmartCards+
Anki
Yak Tack
Brainscape
Numeracy
CleverDeckPopSQL - Modern SQL editor for teams
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.
Redash - Data visualization and collaboration tool.
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
SQL School - Data analysts training data analysts
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.