OptimFROG is a proprietary audio file format developed by Florin Ghido which offers losslessa audio compression. It produces files with the extension .ofr. .ofs (OptimFROG Small) files are produced by the OptimFROG DualStream branch, which offers high-quality lossy compression.
- OptimFROG - Downloads (includes encoders for multiple platforms and input plugins for a number of popular music players)
- RadLight directshow filter
- mutagen - a python module handling audio metadata, which includes OptimFROG support.