Sonarc was probably among the first lossless compressors - the version featured here dates back to 1994. And the age shows - it is not very efficient.

Officially, it is a shareware program, but to my knowledge there are no limitations. Registration is now impossible because the author, Richard P. Sprague, is unreachable.

Compression performance in my limited test: 58,08% (-X setting)


Date: 1994-06-27
Version: 2.1i
Interface: Command line
Platform: DOS
Download: SonArc.zip - 71kB