horst
Basically a command-line mesh-debugging tool :-) Recommended by Freifunk wiki.
"horst" is a small, lightweight IEEE802.11 wireless LAN analyzer with a text interface. Its basic function is similar to tcpdump, Wireshark or Kismet, but it’s much smaller and shows different, aggregated information which is not easily available from other tools. It is mainly targeted at debugging wireless LANs with a focus on ad-hoc (IBSS) mode in larger mesh networks.
wavemon
Console-based signal strength indicator.
aptitude install wavemon