Unity - The multiplatform game creation tools for everyone.
Roblox - Reimagining the way people come together.
Reality Factory - Reality Factory is a free suite of game development tools for building 3D games.
Limon Engine - Limon is a multi platform 3D game engine mainly focusing on first person games.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
CraftStudio - CraftStudio lets you craft games from scratch in real-time over the Internet.