Tynker - Game Worlds for Kids to Learn Programming
Rec Room - Rec Room is an Action, Role-playing, First-person Shooter, Sports, and Multiplayer video game developed and published by Against Gravity.
CodeCombat - Learn programming with a multiplayer live coding strategy game.
Kit55 - The Dev Server GUI for Static Websites. Easy to use, super fast desktop app that will compile your html templates for you.
StackHive - Design, develop or publish websites right from your browser
Kodeclik - Kodeclik is an online coding academy for Kids and Teens.