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
Proof.ink - Proven immutable data stored on the Steem blockchain
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Immutable.js - Immutable persistent data collections for Javascript which increase efficiency and simplicity. - immutable-js/immutable-js
MailClark - The Slack bot for external communications
DataTip - The fastest way to store & access your critical datapoints.