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.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Slack - A messaging app for teams who see through the Earth!
Wondershare PDFelement - All-in-one PDF editor