Sortd - Rated the #1 App for Gmail
SlidesPPT - Beautiful free presentation templates for Google Slides
KanbanMail - A Kanban board for your emails.
Templates by 24Slides - The world’s best library of free presentation templates.
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.
Slides - Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.