Muzli - UI/UX and Design Inspiration Chrome Extension
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.
UI Garage - Specific mobile and web design patterns for your inspiration
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Design Hunt - Curated design inspiration for everyone
Slack - A messaging app for teams who see through the Earth!