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Commercial dual-stack (IPv4/IPv6) embedded TCP/IP implementation.

Commercial embedded TCP/IP stack.

An open-source (BSD-style license) implementation of TCP/IP for 8- and 16-bit microcontrollers.

Commercial TCP/IP implementation for embedded processors.

The IETF tcpimpl working group was shut down in Sep 2000, but the mailing list still exists. Historic archive may also be of interest.

The goal is to make 100Mbps TCP streams over wide-area networks possible for general users.