Sometimes you want an item sorted to the top or bottom of a list of files. For example, an older versions folder for example.
Here are characters that sort below z on a Mac:
- † (option t)
- µ (option m)
- π (option p)
- Ω (option z)
- (shift option k)
I just tested it, and last 3 work in Windows (although definitely not as easy to type!). I personally have been using Ω since it is really easy to type, and makes sense as the last character of the Greek alphabet.