Witeboard - A real-time whiteboard for your team. No signups required.
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.
Whiteboard Fox - Simple Online Whiteboard
UpNote - A beautiful and clean cross-platform app for notes organizer
Stormboard - Stormboard empowers data-driven companies to turn their unstructured whiteboards into data-rich collaborative workspaces; enabling data-driven decisions and efficient processes — often eliminating the need for meetings entirely.
Note Board - Productivity app. Save information like a sticky notes.