You can see I put HDD-Profiler into the File & Manage category. Yes, it is an accurate HDD profiling utility designed to compare and display the differences, changes of some folder before/after being used, operated by system, software or some guy.
CCleaner is hardly the best system junk files and registry cleaning tool, but on balance it has not bad cleaning effect and less negative impacts to system stability. So it is a matter of course that CCleaner has become one of the must-have tools for PC users.
John Wiseman wrote this complete series of survival tutorial (The SAS Survival Handbook) with his own rich experience in half life time of military career. It is intended to teach people how to survive in the open air, including land, sea, desert, remote place on the earth, as well under as any bad or dire weather, environment.
If you are a person focusing on health and like to try all kinds of new apps, then you might have tried some with the subjects of visual acuity or color blindness test. But the fact is they don't like look so professional and practical - most of which are just funny games (e.g.: Eyesight Examiner Side N and THE EYE TEST).