I am using Windows Vista. I'm using these now for a day. I like the program. It's easy to use and looks nice too. Other sticky note programs do not allow you to create a title, but this one does. That was a nice touch.
Just came across this and thought I would give it a try. Used to be a Windows user but have switched to Mac running OS 10.6.6. Wasn't sure if it would work, but downloaded and unzipped Sticky Royale, clicked on the .jar file, and voila! works great!! Just click on the "crown" to get a simple drop down menu and you are in business. You can have as many Notes open as you want which is really handy. The only downside is that I may end up with Sticky Royale notes all over the screen! Suggestion to the developer: Perhaps you should add the Mac operating system to those that Sticky Royale will function on.