A high level C++ network packet sniffing and crafting library. 

libcrafter

A wrapper/facade/whatever to enable/ease the use of jNetPcap (a libpcap based packet sniffing lib) in Clojure

clj-net-pcap

Powerful and versatile MIME sniffing package using pre-compiled glob patterns, magic number signatures, XML document namespaces, and tree magic for mounted volumes, generated from the XDG shared-mime-info database.

GNU General Public License v2.0

mimemagic

A tool for finding and sniffing rss links

MIT License

rss-finder

ngrep is like GNU grep applied to the network layer. It's a PCAP-based tool that allows you to specify an extended regular or hexadecimal expression to match against data payloads of packets. It understands many kinds of protocols, including IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw, across a wide variety of interface types, and understands BPF filter logic in the same fashion as more common packet sniffing tools, such as tcpdump and snoop.

libcrafter

clj-net-pcap

mimemagic

rss-finder

ngrep

game-boy-lcd-sniffing