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.
Swatches - A fun and accurate color picker for the real world
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
ColorSnapper - The missing color picker for Mac.
Slack - A messaging app for teams who see through the Earth!
Colordot for iOS - A color picker for humans.