Meekan - Connecting the world's calendars
Synology Note Station - Without needing to spend money on Evernote, Synology Note Station provides a desktop client to organize all your random notes in one place.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
UpNote - A beautiful and clean cross-platform app for notes organizer
Sidequest for Slack - Create and track personal or support team tasks, 100% inside Slack.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.