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.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
start.me - A Modern-day bookmark manager. A place for your favorites. A news feed (RSS) reader. A browser startpage. A portal for your team.
Slack - A messaging app for teams who see through the Earth!
Pocket - When you find something you want to view later, put it in Pocket.