ScrollToTop (Mac OS X App)
To get the same effect as when you tap the status bar on the iPhone or iPad.

IconMemo (iPhone/iPad universal app)
You can place editable memos like sticky notes on your home screen.

SmartEver (iPhone App)
A lightweight Evernote client application that runs on iPhone.

Duet Browser (iPad app)
Dual window tab browser for iPad.

Touch Icon Creator (iPhone/iPad universal app)
Create custom icons for your Home screen!

TweetLink (iPhone app)
Tweet quickly with title and URL of the page that you are currently viewing in Safari

WebDial (iPhone app)
a simple dial application for iPhone

Calendar (Web app for iOS)
Month icon on your home screen.