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.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
UpNote - A beautiful and clean cross-platform app for notes organizer
OpenBoard - The OpenBoard software is an interactive white board software.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.
Conceptboard - Instant Whiteboards for Teams & Projects