Sortd - Rated the #1 App for Gmail
Reminder - A better way to keep track of your reminders 📝
KanbanMail - A Kanban board for your emails.
Noto - Email yourself. Fast.
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.
fwrdto.me - Send web pages to your email inbox in just one click