The Nanforum Toolkit originated in November 1990 when a number of Clipper developers on Compuserve felt the same way and started to develop their own public domain, user supported library. You can get started by downloading NFREAD.ME (about 1K) from Library 16.
NETTO is a library that contains many useful Netware API functions. It was developed in the same spirit (and by some of the same people) as NANFOR. You can get started by downloading NEDESC.TXT from Library 16.
The GT Library was likewise developed by the regulars on the GT Power network's Clipper echo.
Vern Six of CenTex Computer Consulting also offers his libraries as public domain and freeware.