myHead[free] is a simple, clean and very fast application to store and manage your notes. The free Head is a reduced version of myHead[extended]. You can also have your own custom Head with your own name and icon and in your language - just visit: myownhead.
You can check out what apps your friends are adopting by going to the
friends page on your profile and clicking on the more link on the right
hand side. Of course, you can also subscribe to this as a RSS feed.