Logic Puzzles Daily - Logic Puzzles Daily app comes up with features to help you in taking challenges so you can clear levels after levels of brain teasers.
Treehouse - Treehouse is an award-winning online platform that teaches people how to code.
Crossword Puzzle Free - Crossword Puzzle Free is an app by Redstone Games that provides you with a variety of different puzzles according to various difficulty levels such as easy, medium, hard, and pro, etc.
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Monstrum - A procedurally-generated, permadeath horror game
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.