This article is from the FAQ, by with numerous contributions by others.
Oslonett's Remsock is a little-used SLIP emulator similar to Twinsock
in that it includes its own stack. Much of the documentation is in
Norwegian. Aside from compatibility problems, Remsock's biggest
failing is that it's "crippleware." It stops working 15 minutes into
each connection until you pay the registration fee ($15). Available