I'm an experienced programmer learning Cocoa, and it's coming along well enough, but I know that I won't retain any of it unless I put it to work. I would like to have a few simple projects that I can work on to put Cocoa to use, but am having trouble coming up with many good ideas, or at least any that inspire me at all. I can surely come up with some interesting project ideas in general, but they're all more advanced than I'm ready to take on right now. Simply, I'm asking for a range simple project ideas that would be good for someone new to Cocoa. Stuff like a tabbed RTF editor, a simple data organizer, a chat client, etc. Please don't suggest that I find an open source project. I don't want to jump into someone else's code; at least not yet. Thank you.