A group of useful tools for working with 802.15.4 networks. Currently includes a sniffer that interfaces with Wireshark in Windows/Linux (and maybe Mac OS X too), allowing you to do 802.15.4, ZigBee, and 6LoWPAN Sniffing.
ScardFace is a python3k library for interfacing with smart cards, which supports Plug-and-Play readers inclusion and threading. It also offers classes for manipulating APDU cmds and resps, and use them in a transport-protocol-independent fashion.
RTP text/t140 Library is a reference implementation for RTP Payload Type for Text Conversation (RFC 4103). The library has source code for encoding and decoding RFC 4103 data, and may be used either as a plug-in to JMF or in a separate RTP sender/receive