Terminal Email Client
Long time ago, when I used Solaris -- I used mail, then elm, then pine. I really liked elm for its simplicity, lightweight.
I couldn't find elm for Linux or its clone, but found Alpine which is Apache License Pine.
- elm - https://en.wikipedia.org/wiki/Elm_(email_client)
- pine - https://en.wikipedia.org/wiki/Pine_(email_client)
- alpine - https://en.wikipedia.org/wiki/Alpine_%28email_client%29
- mutt - https://en.wikipedia.org/wiki/Mutt_(email_client)
There are plenty of web sites showing how to set up Alpine for Gmail, so won't put another step here. Just visit this page, for example - https://www.xmodulo.com/gmail-command-line-linux-alpine.html
There is a terminal version of spreadsheet -- feels like VisiCalc or Lotus 1-2-3. It's called Spreadsheet Calculator (SC), https://en.wikipedia.org/wiki/Sc_(spreadsheet_calculator)
It's pretty useful sometimes when you are stuck in terminal, or want to do quick calculation.
See these pages for usage,