Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.

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

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

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

Wondershare PDFelement - All-in-one PDF editor

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