While the tweeted 'stack' only responds to pings the other work by sics in general and Adam Dunkels in particular is very interesting. I've ran their Contiki OS

While the tweeted 'stack' only responds to pings the other work by sics in general and Adam Dunkels in particular is very interesting. I've ran their Contiki OS and uip stack on a atmega8 microcontroller that had 8 kB of Flash and 1 kB of SRAM. If you are into tiny or embedded operating systems and network stacks I highly recommend taking a look at Contiki.