Slack - A messaging app for teams who see through the Earth!
SlimPlanner - Team scheduling, resource planning, task management
WorkStudio - Simple, collaborative work management
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.
Flow - Stop managing projects from your inbox.
WorkPatterns - The modern manager's toolkit: 1:1s, feedback, & recognition