There are a lot of PC cleaning apps (cleaner, optimizer, system care, tune-up), some work pretty well, some are just scam. But the feeling of relaxation after the end of the cleaning process is priceless. This is where "Placebo Cleaner" comes in.
You don't have to clean your PC for hours or risk your computer crashing if something goes wrong with the clean-up. Placebo Cleaner can (or can not) fix your computer's RAM, drives, registry and gaming-related issues. Actually, a relaxation after the "All issues are fixed!" message will be all you will get, no bits will be harmed.
Placebo Cleaner does nothing but makes you feel good about "cleaning" your desktop or laptop computer. You can enjoy this free utility with friends and family. It can be a good present for April Fools' Day. 
Category: Games & Entertainment 
Other
Supports: 
Windows 11, Windows 10, Windows 8/8.1, Windows 7, Windows Vista (32-bit & 64-bit)
Language: English
License: Freeware — no nags, no ads, fully functional
Difference between Installer and Portable Editions Vovsoft Portable Software List Placebo Cleaner Feature Requests
Finally a cleaner I can recommend. They should make antivirus software too. It would let malware through but throw false positives and update 3 times a day to give you a false sense of security - like real AV but without wasting system resources.
— Gownaar 
We have to admit, there was no way we were going to add this to MajorGeeks, but two things happened. The first was it was April’s Fools Day. The second was a computer brought to me just days ago with a broken Microsoft Office. They tried to delete files to make space when the real issue was that a larger hard drive was needed. The files they deleted fixed nothing and broke Microsoft Office. Had they used Placebo Cleaner, they could have saved me a few hours of my time.
— MajorGeeks
Installer
Portable
Batch Image Resizer 
Duplicate File Finder 
Vov Sticky Notes