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

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

NoteCalc - Browser-based notepad built for math calculations.

FakeSMTP - FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily.

Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.

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