Defold is a free and open-source game development framework for Windows, Mac and Linux platforms. It's renowned for its intuitive design, powerful features, and extensive community support. Its focus on rapid iteration and collaboration makes it an ideal choice for teams of all sizes, from solo developers to large studios.

PlayMaker is a very popular visual scripting tool (based on finite-state machine, FSM for short), also a hierarchical logic framework for Unity, developed by Hutong Games from China. Game designers and programmers can use PlayMaker to conduct interactive development with Unity, and quickly complete prototyping of games. Therefore, it is suitable for both independent developers and team collaboration, greatly improving the game development efficiency.