The uIP is an open source implementation of the TCP/IP network protocol stack intended for use with tiny 8- and 16-bit microcontrollers. It was initially developed by Adam Dunkels of the "Networked Embedded Systems" group at the Swedish Institute of Computer Science, licensed under a BSD style license, and further developed by a wide group of developers.
ulP is used by all developers. 
( z1 use :ARG0 ( z2 person :ARG0-of ( z3 develop ) :mod ( z4 all ) ) :ARG1 ( z5 product :name ( z6 name :op "ulP" ) ) )