Stache - Stache makes it quick and easy to collect and re-discover pages you find useful, interesting or inspiring, in a beautiful, visual and fully searchable library.
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.
PutCut - PutCut is a social bookmarking tool for saving links.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Pocket - When you find something you want to view later, put it in Pocket.
Slack - A messaging app for teams who see through the Earth!