I am using 2 apps. ColorNote allows you to make little post its to put on your home screen! It is very cute, and useful! I also got Mobisle Notes Free. This lets you make lists with check boxes that you can check off as you get an object or accomplish a task. That item then grays out. Very handy!
I have recently started usingNote Me which does the color coding, check boxes, reminders, export in txt format, add to calender, catogorizing, posts to home screen, and more. The only thing I wish you could send the note in Noteme format to easily share your notes. Otherwise I love that app.