brinktastee wrote in that he used stuffit to get a previously set of files in zip to compress down from 8mb to 6.4 mb to mail intermediate result files back to the techs. For years I've been using 7-zip, mostly storing to the rar format, sometimes their 7z packaging. Are there other famously better, where I think WCG uses the on the fly gzip format. There's claim to fame also for something to WinUHA.

On the quick found this comparing review

http://file-compression-software-review.toptenreviews.com/

Do tell, what's best for you, for free of course :D