Castle Game Engine - An open-source 3D/2D game engine for ObjectPascal.
Rec Room - Rec Room is an Action, Role-playing, First-person Shooter, Sports, and Multiplayer video game developed and published by Against Gravity.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.
Kit55 - The Dev Server GUI for Static Websites. Easy to use, super fast desktop app that will compile your html templates for you.
WaveEngine - The definitive free cross-platform mobile engine to unleash your games using C#.
Kodeclik - Kodeclik is an online coding academy for Kids and Teens.