resend-cli is a brand new command-line tool that allows you to access your Resend account from a console.
I chose creating a CLI instead of a GUI simply because it takes less time and tools such as enquirer have the ability to make terminal-based apps beautiful.
resend-cli allows you to send emails, create API keys, list API keys, create audiences, add contacts, all from your terminal. Give it a try - go to the github repository and then download the latest stable release.