MMT/ATL Transformation Language (ATL)
The ATL project aims at providing a set of transformation tools for GMT. These include some sample ATL transformations, an ATL transformation engine, and an IDE for ATL (ADT: ATL Development Tools). ATL is part of the AMMA platform.
A number of pages can help you developing transformations in ATL:
AM3 Ant Tasks provides tasks to load and save models as well as run ATL transformations.
The ATL Wish List contains a list of requested features. This is a place where you may add your own requests.
ATL 2006 is the next upcoming version of ATL.