Chester County InterLink - of ESR fame
Greenbelt Internet Access Cooperative - Also offers basic hosting services. (dissolved in 2006)
HoosierNet - 501(c)(12) Bloomington Indiana internet/computer network service (ceased operations in 2006)
NCF, or Freenet, 1992 - 2nd of its kind. Also a community organization linking people in Ottawa.
PunkNet - former cooperative ISP, sort of transformed into a commercial hosting company? (apparently dissolved or renamed)
RAIN - old internet "charity" which offers internet access, basic hosting, and a variety of services (website offline as of 2021-10-24; domain still registered)
Ruby Ranch Internet Cooperative - 501(c)(12) cooperative DSL ILEC - about two dozen rural Coloradans with a DSLAM in a horse barn connected to Qwest's copper