From TealPoint Software:
More than just a visual skin, TealOS is a multi-functional application launcher that gives your time-honored handheld the exciting look and feel of the newest devices. Providing a powerful and intuitive way to organize your activities and work flow, it runs under PalmOS but simulates the card-based interface of WebOS on the new Palm Pre. TealOS comes complete with support for thumbnail image cards, a translucent applications screen, customizable background images, and even a popup wave launcher. While keeping your existing phone and applications, it's the next best thing to a brand new phone.