iPadian is an iPad emulator / simulator for Windows, which allows you to run some iPad apps in an iPad-like interface on your Windows PC desktop.
Features:
- Standalone Adobe air application
- Full Screen preview
- Custom App Store
- Games
- Free music & videos
- Webkit browser
- Support Facebook notification & messages
- Social Chat
There is only one problem with iPadian currently. The program doesn't have Apple App store for copyright reasons. So you're restricted to iPadian's own custom app store.
Download iPadian | Mirror
iPadian is available as an open-source program for Windows 8, Windows 7, Vista and XP, available on Google Code. Don't forget to install Adobe Air before downloading iPadian.
Update: A WinMatrix member KaneBT has also made a simple iPhone emulator.