Hi! I really like the design of the Mountain Lion Notes, Calendar and Contacts app over Mavericks one. I was just wondering Is there a way to get that back?
You could try moving the .app over and seeing what breaks. I was able to get the Mountain Lion version of QuickTime Player working on Mavericks, but it required an absolutely enormous amount of work!
I tried moving the Notes.app file over from ML to Mavericks and it didn't work. I think you'd have to mess with a plist file of some sort to get Mavericks to see it as version 2.0 instead of 1.whatever but I'm not sure how to do that.