A minimal Contiki-NG example, simple printing out "Hello, world". This example runs a full IPv6 stack with 6LoWPAN and RPL. It is possible, for example to ping such a node:

make TARGET=native && sudo ./hello-world.native

Look for the node's global IPv6, e.g.:

[INFO: Native    ] Added global IPv6 address fd00::302:304:506:708

And ping it (over the tun interface):

$ ping6 fd00::302:304:506:708
PING fd00::302:304:506:708(fd00::302:304:506:708) 56 data bytes
64 bytes from fd00::302:304:506:708: icmp_seq=1 ttl=64 time=0.289 ms