$1.99 from Tommy Kammerer
“Webcams” displays up to 6 webcam images at the same time. Tap one of them and a larger version will be displayed. Rotate your iPhone to landscape if you like, tap again to go back.
Of course all webcams are customizable and with the bookmarklet that comes with this app you are able to add any open webcam picture from mobile safari.
All you have to do is clicking a bookmark in safari and the webcam will be added to your webcams app.