For example, Luxology just announced the availablity of SLIK, the Studio Lighting & Illumination Kit. This kit includes all the tools that studio lighters would use based on real-world photography systems. Within the kit are all the meshes, backgrounds, HDR images, lighting setups and controls that you need. This enables digital artists that are familiar with the tools of the trade to use the tools they are familiar without having to learn a ton about some 3D package. It also lets they gradually get into 3D using a familiar system.
Other kits include the Splash kit for creating water splash effects and watch for other kits in the future.