Is a small, lean, open source and simple replacement firmware for Broadcom-based routers. It features a new easy to use GUI, a new bandwidth usage monitor, more advanced QOS and access restrictions, enables new wireless features such as WDS and wireless client modes, raises the limits on maximum connections for P2P, allows you to run your custom scripts or telnet/ssh in and do all sorts of things like re-program the SES/AOSS button, adds wireless site survey to see your wifi neighbors, and more.
Since router's graphical interface is a must for most users, its most important part of system. Tomato comes with a old web style interface with option to change color scheme but for some of us that is not enough. The style is too old and its just not so nice to look at. AdvancedTomato offers a choice to upgrade your router's GUI to a new, Flat UI a like design, with Tomato by Shibby features and most importantly new way of look. Some would say its simply awesome designed interface!
Open source community is what makes projects like mine possible. Without projects listed bellow, AdvancedTomato wouldn't be what it is today.