Nvidia Corporation decided that Gelato Pro 2.2 rendering software needs to be free and released it as such,

Gelato is a GPU-accelerated, final-frame renderer for the creation of high-quality computer-generated images. The software was initially developed to render film and broadcast visual effects and animation but now it can simply be used with 3D software applications, CAD, industrial design, and architecture.

"NVIDIA Gelato Pro 2.2 software is extremely powerful GPU-accelerated rendering software and we are excited to support the creative community by making it freely available," said Dominick Spina, senior product manager, Digital Film Group, NVIDIA. 'Now all artists and designers with NVIDIA Quadro graphics cards can enhance their production pipelines with Gelato Pro

Nvidia's Gelato Pro 2.2 free for download