There are tons of software out on the internet for windows. I will try to group it but, have not yet finished the grouping categories. I will post just a few now and group them later.
System information: is one of the best small programs to identify your system.
Antivirus: Avira is one of the best free antivirus software. (Free)
Web Browser: Firefox.
Uninstaller: Revo Uninstaller.
Local search: Everything search from Void Tools. Note that it only searches local drives no network searches but, it is fast, clean and small. I give this program a solid 10, you will be impressed.
Registry cleaning paid: JV16 power tools from Mace craft.
Burning software: Image burn is the best (free).

USB iso installer software Rufus usb tool.
PDF reader, then Foxit reader (free) is the way to go. It is 4 times faster and smaller than Adobe's reader.
Top Windows 10 cleanup and stop spying tools, plus best all in one installer for new builds.
O&O shutup 10, cleans all the spyware that Microsoft installs on Windows 10. For most users just pick the recommended choices.
Windows10Debloater, an open source debloat tool that removes all the junk Microsoft tries to force down your throat. If you use, please give a donation to this person, he has made the best tool for removing craposoft.
BleachBit you can free cache, delete cookies, clear Internet history, shred temporary files, delete logs, and discard junk you didn't know was there.
Ninite, Install and update all your programs at once.