Difmap
Difmap (Shepherd 1997) provides editing, imaging, self-calibration, and pipelining capabilities in an interactive package. It was developed as part of the Caltech VLBI Analysis Programs and remains widely used, although development has been frozen and continued support is limited primarily to assistance in installation.
Difmap download site: ftp://ftp.astro.caltech.edu/pub/difmap/difmap.html. Contact: M.C. Shepherd, mcs@astro.caltech.edu.
