3M’s Post-it Notes have been around since 1980. Post-it PopNotes makes its appearance this week as an official digital version of the product. And, despite a problem on the iPad (more on this later), it is a winner. Even better, it is free. And, yes, it even has a cool social aspect to it.

Post-it PopNotes

You can either use ink (draw or write with your finger tip) or type text on a PopNote. I ran into a problem when using ink on an iPad 2. The PopNotes app crashes every time I try to save a note with ink on it. It works fine on an iPhone 4.

Of course, Post-it PopNotes have features that would be impossible on a piece of sticky paper. You can assign a reminder to a PopNote. You can also have a PopNote “expire” after a period of time (months) have elapsed. Most interesting, however, is the ability to share PopNotes. Notes can be shared with a defined individuals (“Friends”) or with anyone using Post-it PopNotes (“Everyone”). Notes can also be associated with a location. You could, for example, leave notes at places for other people to read.