Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
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.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Sketch + InVision - Design prototyping, collaboration & workflow for Sketch
Slack - A messaging app for teams who see through the Earth!