This GitHub project hosts the Spine Runtimes which are needed to use Spine 2D skeletal animation data with various game toolkits.
You can play with and evaluate the Spine Runtimes and the examples we provide in this repository free of charge.
If you use the Spine Runtimes in a product, like a game or an app, you need a valid Spine Editor license at the time of integration. You can sell the product to consumers and other companies without any additional licensing requirements, provided they can not modify the product. However, if you sell your product to another company that wants to modify the product, the company will need a Spine Editor license. You can keep selling your product even if your Spine Editor license expires!
If you integrate the Spine Runtimes into development tools for other developers, like an OSS game engine, or a commercial SDK, the users of your development tools will need a Spine Editor licen