where can I find Apple legacy software
What is the URL for Apple's legacy software site location. looking specifically for apps that will work on OS 10.13
iMac 21.5″, macOS 10.13
Apple is pretty tight with older Apps, very little chance of getting it from Apple unless it shows in AppStore>Purcases.
A couple of things that may help...
Mostly you just need a more modern Browser than Safari High Sierra like Firefox or Brave.
Look into the Free LibreOffice, it handles MS Office files like Word & Excel, & Page Layout…