I just got a new one called Private-i.
The icon is just black with the words 'PRIVATE' on it. When you open it, it says 'Loading Pics' with a loading bar that takes about 2 minutes to complete. Once complete, an error box opens that says to reconnect to the network.
Basically, what it's doing is tracking it's location and emailing it to a preset email address which provides a link showing the coordinates on Google Maps. It's meant to help you find your phone if it is stolen. But parents also use it with their kids by phoning them and telling them to run the Private-i app. It's pretty clever I think.
It is slightly flawed however. You can change the email in the Settings and there is no encryption on this. Also, you'd have to have an email address that isn't forwarded to your own iPhone because that would be stupid.
And I've got some vintage effect iPhone camera apps.
Parlingo for Instant Messaging
Around Me is good too.
Ebay
Wikipanion
Flixter for film info and cinema listing
Sol Free (solitaire)