echolot is developed and maintained by
  Benjamin Schweizer <gopher at h07 dot org>, http://www.redsheep.de/
A lot of help with the BSD port, critics and indeas were given by
  Andreas Turtschan <darklordat at gmx dot de>
There are several people who build packages. I've seen some for Debian
and FreeBSD. Thanx to all the people who make this work and help free
software to spread.
The libpcap is developed and maintained by
  the tcpdump group, http://www.tcpdump.org/