Pics.io - Pics.io is a cloud service that people can use to manage their creative content and files, collaborate with their peers on this content, and then share it with their clients. Read more about Pics.io.
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.
Google Drive to Slack - Slack notifications whenever you work on Google Drive docs
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Invision - Prototyping and collaboration for design teams
Slack - A messaging app for teams who see through the Earth!