Hey! is a very basic reminders system written in Python.
Also, the name of the app is "Hey!", it's only called "Hey-Exclamation-Point" because Github won't take a "!" in a project title.
Because it is something I wanted to write.
I wanted something with the ability to give me reminders in with really weird parameters and exceptions.
I also want it to be flexible and cross-platform.
I couldn't find any ones I love. Here are some I did find, feel free to suggest additions. This is not an endorsement for any of these, just a handy reference table.