Looks like there is a new SDK as well, and a 64-bit version. One of those lossless codecs with no hardware support, but really good for archiving tons of music files since the space savings can be significant... Also supports full 32-bit Floating point which FLAC does not (think backing up mastering projects).

The guy is also working on multi-channel support, and a new OptimFROG Asymmetric encoder.

Anyone create a dynamic CLI for OptimFROG yet? I see the encoder on this site is 32-bit only :(

From the website, OptimFROG has the following notable features:

  • usually the best lossless audio compression ratios
  • optimal support for all integer PCM wave formats up to 32 bits
  • fully featured Windows Media Player, foobar2000, Winamp 2/3/5, dBpowerAMP, XMPlay, QCD, and XMMS input plug-ins for playback
  • fast operation, default mode encodes CD quality audio data at 12.4x real-time and decodes at 17.4x real-time on AMD Athlon XP 1800+, while the fastest mode encodes at 28.1x real-time and decodes at 24.7x real-time
  • Windows, Linux, OS X, and FreeBSD command line versions
  • simple to use, but powerful Windows GUI front-end, Kermit (made by Speek)
  • extensible, streamable compressed format, tagging compatible
  • optimize option, further improving compression at no decoding cost
  • backward compatible with version 4.2x (decode only)
  • 64 bits large file support under 32-bit versions of Windows, Linux, OS X, and FreeBSD
  • complete pipe support for encoding and decoding
  • complete raw file support
  • quick verify compressed file integrity function
  • compatible with Exact Audio Copy, with ID3v1.1 tagging
  • extensible command line format
  • multiple file processing on the same command line, with wildcards
  • option to store MD5 of raw PCM input data and function to check it
  • option to delete source file after successful operation
  • option to copy source file time stamp to destination file
  • bitstream error resilience and transparent real-time recovery
  • fast seek with intelligent caching for plug-ins
  • ID3v1.1 and APEv2 read tagging support for plug-ins, ID3v2 compatible
  • streaming support (playing HTTP streams) for foobar2000 plug-in
  • Replay Gain compatible plug-ins for foobar2000 and Winamp3
  • complete support for creating self-extracting (sfx) archives
  • fully featured SDK for using compressed files in any application