NetFront Life Screen launcher for Android..

NetFront Flife Screen for Android is a new applications that makes your home screen (launcher) look cooler and more interactive.

NetFront FlexUI makes it possible to quickly develop rich and sophisticated user interfaces on the Android platform. ACCESS offers a comprehensive development environment that includes a special tool that facilitates the management of complex UI screen transitions while reducing development costs and implementation time.

I have tried on my Captivate and works great.. I am sure this will work also on your Vibrant or mytouch 4G

You can download the APK file from here

Thanks to XDA

Source :

NetFrontTM FlexUI
A comprehensive UI framework solution that works with any
graphic engine
NetFront FlexUI makes it possible to quickly develop rich
and sophisticated user interfaces on the Android platform.
ACCESS offers a comprehensive development environment
that includes a special tool that facilitates the management
of complex UI screen transitions while reducing development
costs and implementation time.