No specific info about version 3.1. Please visit the main page of RawCodecs on Software Informer.
Xiph.Org Open Codecs - most complete implementation codecs for Windows.
Converts RAW CRW files to raster formats like TIFF or BMP.
View your RAW format files with this little, easy to use image viewer.
Convert RAW drive to NTFS, change RAW file system to NTFS.
The Matrox VFW Software Codecs let you render and play back Matrox .avi files.
Stepok's Raw Importer is an easy-to-use raw importing and converting tool.