Godot Engine - Feature-packed 2D and 3D open source game engine.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
MonoGame - MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
RPG Maker - Make your own PC game with RPG Maker. Our easy to use tools are simple enough for a child, and powerful enough for a developer. Try it free today!
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.