Microchip's TCP-IP Stack 5.42 modified for PIC-WEB REV.C (will not work without modification on other versions of the stack), there are project files for both MPLAB 8.xx and MLAB X
Microchip's TCP-IP Stack 5.31 modified for PIC-WEB REV.C (will not work without modification on other versions of the stack) created by Paolo Chiarabaglio