These tools have reached end of life and are no longer supported. Some of them have evolved into new, open-sourced versions. All of them are provided here without warranty as a convenience in case you need them.
AMD GPU MeshMapper
GPU MeshMapper re-invents the process of generating maps (including normal, displacement, and ambient occlusion maps) for a low-resolution mesh based on the details from a high-resolution mesh.
CubeMapGen is a tool for importing, filtering, visualizing, and exporting cubemaps.
Normal Mapper is a toolset for developers to easily generate and test maps.
RenderMonkey is a rich shader development environment for both programmers and artists that facilitates the collaborative creation of real-time shader effects.