Awesome apps you should know about are determined by your lifestyle. The app store has a section called categories and you should browse those that fit your lifestyle. Awesome to me might be boring to you and vice versa.
Yes there are a bunch you should know about. Look through the app store to find them then you will know about them, and knowing is half the battle. I consider this app to be awesome because I can get people to read these long winded answers without actually answering their stupid ass question. Isn't that awesome!!! I think so!!