Joshua Wright of www.willhackforsushi.com gives a demonstration of injecting audio into a blutooth headset device and eavesdropping on conversionby the victiom or people around him.
From Hackzine: “All that is necessary is knowing the device address, which can be easily sniffed, and the secret pin, which defaults to 0000. The headset audio is tapped while not [...]

Any song with the title tag as “Amarok” and Artist name as “Mike Oldfield will cause the following Easter Egg OSd popup:

“One of Mike Oldfield‘s best pieces of work, Amarok, inspired the name behind the audio-player you are currently using. Thanks for choosing Amarok!
Mark Kretschmann
Max Howell
Chris Muehlhaeuser
The many other people who have helped make Amarok [...]

labrea creates virtual machines for unused IP addresses in the specified block of IP addresses. LaBrea sits and listens for ARP “who-has” requests.
When an ARP request for a particular IP goes unanswered for longer than its “rate” setting (default: 3 seconds), labrea crafts an ARP reply that routes all traffic destined for the IP to [...]

This is a simple encryption tool to work with home-grown encryption algorithms. It can run as either a GUI, a command-line application, or a network proxy.
In command prompt you could use something like gcipher -C Gie test test2. Here the Gie is the cipher, test is the input file and test2 is the output [...]