The Best File Compression Programs

BZIP2 and
7zip are the best compression tools.

Versions to use: 7zip-4.15 release :: bzip2 whatever Cygwin provides.

7zip provides a reasonable user interface, can handle many popular formats and zips smaller and faster than most anything else.

However, when you're on a unix/linux machine or if you are using Cygwin and want to do a bunch of programs in a directory, there's nothing like using "bzip2 -9 *" to get your files tiny quickly, though BZIP2 doesn't have a gui...