Castle Game Engine - An open-source 3D/2D game engine for ObjectPascal.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.
Clever - syncing between education applications for K-12 schools
Godot Engine - Feature-packed 2D and 3D open source game engine.
Claroline - Claroline is a collaborative eLearning and eWorking platform.