Godot Engine - Feature-packed 2D and 3D open source game engine.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
BYOND - BYOND is the premier community for making and playing online multiplayer games.
Rider - Rider is a cross-platform .NET IDE based on the IntelliJ platform and ReSharper.