Very simplified alternative to #Scapple. In most cases I would go with Scapple. The advantage here is that it is very easy to incorporate status and importance information into the diagram (by color and thickness of the box borders). This is an easy way to document the activities of the day. But then again, Scapple is also, and is far more flexible albeit more expensive.
Recommended but a stability improvement (bug fix) is needed.
Click image to expand.