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.

Glitterly - The video editor for making short video clips of your apps

Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)

InVideo.io - Create thumb-stopping videos in mins for just $10/month even if you've never edited a video before!

KanbanMail - A Kanban board for your emails.

Coub - Coub is an app that features GIFs, but the GIFs that you select and send to other people have sounds.