MonoTouch - iPhone application Development Tool

MonoTouch allows developers to create C# and .NET based applications that run on Apple's iPhone, iPad, and iPod Touch devices, while taking advantage of
the iPhone APIs and reusing both code and libraries that have been built for .NET, as well as existing skills.

Features:

1. C# and .NET on the iPhone
2. .NET Bindings to Native APIs
3. Distribute on the Apple App Store
4. Enterprise deployable
5. MonoDevelop and XCode Integration
6. Interface Builder Integration
7. Automatic Memory Management

A New release MonoTouch 3.0.8 version supports IOS4 version.

MonoTouch requires a Mac, Apple's iPhone SDK and you must be part of Apple's iPhone Developer Program to test and deploy your software on a device and to redistribute your code.

Trail Version of MonoTouch Avilable from monotouch.net

Requirements:

1. iPhone SDK 3.2 or higher
2. An Intel Mac computer running Leopard or Snow Leopard
3. The latest release of Mono for OSX

Mono Develop is an IDE for development.

MonoDevelop is avilable from http://monodevelop.com/Download.

Need to install the latest version of Mono and MonoTouch to up running the monodevelop IDE.


Source: monotouch