Slack Message Buttons - Making messages more interactive with buttons
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Tab Butler - A tab manager at your service.
MailClark - The Slack bot for external communications
Commandline Challenge - Test your command line skills
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates