Simple Diagrams

Simple Diagrams is a small desktop application that helps you express your ideas quickly and simply. There's just enough functionality to describe a thought or capture a process. Simple Diagrams keeps the visual expression clear through the simple design of library items and backgrounds. There is a FREE version along with the full version for $25.

Features

• drag, drop, and size symbols from libraries
• add photos and post-notes
• various backgrounds styles (chalkboard, whiteboard, etc.)
• save diagrams on your computer
• export your diagram to PNG

And, since Simple Diagrams is built on the Adobe Air platform, it will run smoothly on Mac, Windows, and Linux.

Here's a screenshot of application in use: