FakeSMTP VS Calc iOS App

MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

Mailtrap - Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.

GetBricksApp - Bricks is a note-taking web app with a built-in calculator. It can be installed as a desktop or mobile app, because of PWA technology this app built with. Which is also makes it offline available. Notes created with Bricks can be shared.

MailCatcher - MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...

PyCharm Community Edition - "The intelligent Python IDE with unique code assistance and analysis, for productive Python development on all levels."