Gizmos Freeware doesn't actually make the software, it just reviews it. Therefore you would have to ask about specific software in order to get a sensible answer. What I can tell you is that Gizmos Freeware is quite trustworthy and I have yet to come across a recommendation for bad software - however it's always best to double check with the Web Of Trust or McAfee SiteAdvisor.
Web Of Trust: http://www.mywot.com/
SiteAdvisor: http://www.siteadvisor.com/
Referring to http://download.techsupportalert.com/9-great-freeware-programs.pdf , all of the programs listed are well known and generally trusted. As I said before, Gizmos Freeware isn't known for recommending bad software.