This list is weirdly not that helpful. `planor`, the planetary orbital calculator, sounds cool, but it's actually "A TUI client for cloud services for aws, vultr, heroku, etc." No orbits in sight! Now I'm not sure which of the descriptions are accurate.
actually a thing, I use it whenever a website that I am most likely never going to visit again forces me to enter an email address, then I generate a temporary email address just to receive their email, whether it's a confirmation code, download link or whatever.