What app is so useful, you can’t believe it’s free?

Here's how you actually free space on your computer in a way that matters without installing some malware "fix-it" program or need a computer divining rod to find every random file:

• WizTree: Scan your entire computer hards drive(s) in a matter of seconds and display a very useful graph and data about where your space it being taken up. It's eons faster and easier to use than the leading competitor WinDirStat to the point where I can't imagine why anyone would use something that isnt WizTree.
• BCUninstaller: It helps uninstall as many apps and programs off of your computer automatically with little to no user interaction needed beyond hitting the "start" button
• BleachBit: It deletes all the temporary and nonessential stuff that gets accumulated over time. It won't clear as much as BCUninstaller or deleting stuff with WizTree and a lot of apps will generate most temporary files again anyways but I do typically see a decrease of around a gigabyte or two. Worth a shot in any case.
• Winget: While not a software in the general sense, Winget is a package manager built into Windows 10/11 itself that lets you automatically download, configure, and install a ton of programs in one command via command prompt or PowerShell.

Every single program I've listed here are available on Winget.