The free version of IDX Renditoner Express includes all the same features as IDX Renditioner but differs in render size and possibly speed.
IDX Renditioner Express (Free) supports a maximum render size of 640 x 480 pixels.
(IDX Renditioner supports a maximum render size of 4096 x 4096 pixels, a full 16 megapixels. It also supports multithreading for much faster rendering on multiprocessor systems, necessary on the large images.)
IDX Renditioner Express (Free) is supported only via the forums at http://forums.idx-design.com.
Select your version, for PC or Mac by clicking on the image to the left.