NetX

NetX Duo is a full IPv4/IPv6 dual-TCP/IP stack, with applications including AutoIP, DHCP, DNS, FTP, TFTP, SNMP, PPP, Telnet, and a BSD-compatible socket layer. NetX supports all microcontrollers based on the Cortex-M1/M3 and ARM7/9 processors. NetX is small in size, making it ideal for embedded applications. NetX is provided in full source code form, and is royalty-free.