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.
24sessions - If Calendly 📆 and Skype 📞 had a baby 👶
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Tiny Beautiful Things - Advice on Life and Love from Dear Sugar
Slack - A messaging app for teams who see through the Earth!
Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss