mmhmm - Bring yourself and your personality into your video chats
Sortd - Rated the #1 App for Gmail
Hexcord - Create presentations that you can livestream to YouTube
KanbanMail - A Kanban board for your emails.
Excalideck - An app for authoring slide decks that look hand-drawn.
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.