Curator - The visual notes app, now on iPhone!
Garbage - In my opinion, poor quality Whiteboard paint, do not buy
Ziteboard - Ziteboard is an zoomable online whiteboard that lets team to collaborate in real-time.
AuthorBee - Organize Twitter around your interests
Idea Paint - Create a usable, interactive space on any flat surface
Amazon Machine Learning - Machine learning made easy for developers of any skill level