What happens when you cross a Post-it Note with a computer? Post-it Software Notes - the classic yellow note designed for your PC! Use the software from the company that invented the Post-it Note. This digital version of 3M's famous canary yellow note is perfect for quick reminders on your computer desktop so you never miss a meeting, event, or thought. With the free Lite version, you can create your own notes with pictures and hyperlinks, stic..