VistA - join
Discussion pertaining to the use of the VistA healthcare information system (HIS) created by the US Department of Veterans Affairs (VA). Developed at taxpayer expense, VistA is in the public domain through the Freedom of Information Act (FOIA)
Low activity, 127 members

comp.lang.mumps - join
The M (MUMPS) language & technology, in general.
Low activity, 294 subscribers, Usenet

George James Software - Public - join
Public discussion forum for George James Software's Caché related products.
Low activity, 216 members, restricted