Mural - MURAL is a visual collaboration workspace for modern teams.
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.
Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.
UpNote - A beautiful and clean cross-platform app for notes organizer
Witeboard - A real-time whiteboard for your team. No signups required.
Note Board - Productivity app. Save information like a sticky notes.