[jZip][1] was mentioned a few times on SU, the problem is that it is [possible malicious software][2].

The most prominent problems I've found are:

 * The website was registered via a proxy service, there's no way to figure out who owns it
 * The website seems to be associated with the [Panthera Project][3], which is a project of the Discordia Limited company, part of the RIAA 'P2P hunters'.
 * A scan on virustotal.com of the Setup didn't reveal anything, but I'm not eager to test it out by installing it

Yes, I know that this is very vague information...so, shall I further investigate this or leave it be?

 [1]: https://superuser.com/search?q=jzip
 [2]: http://www.mywot.com/en/scorecard/jzip.com
 [3]: http://www.mywot.com/en/forum/3727-pantheraproject-net