Sortd - Rated the #1 App for Gmail
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
KanbanMail - A Kanban board for your emails.
OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Instaparser - Cleanly pull content from any website