The latest ESMF development is happening in GitHub:
https://github.com/esmf-org/esmf
https://earthsystemmodeling.org
The Earth System Modeling Framework provides high-performance software infrastructure and superstructure for the construction and coupling of climate, weather, and data assimilation applications.
UPDATE March 14, 2018
Repository and tracking officially moved to github. https://github.com/opticks-org/opticks
Sourceforge mailing lists are still in use.
Opticks is an open source remote sensing application and development framework.