Normally, only one process at a time can use the QUEUE target provided by netfilter, the Linux 2.4 firewalling subsystem. ipqmpd solves this problem by acting as a multiplexer between the QUEUE target and multiple processes. The package includes a compatibility library (libipqmpd) which makes porting from the netfilter-provided libipq easy.
The Userspace Logging Daemon (ulogd) is a flexible framework for extensive logging of packets on a firewall machine. ulogd uses the ULOG target of iptables/netfilter, the packet filtering framework of Linux 2.4 and 2.6. It supports binary plugins for adding packet interpreters and output-targets (e.g., for logging into databases, user-defined filetypes, etc.).
libnfnetlink is a low-level userspace library for nfnetlink-based communication between the kernel-side netfilter and the user-space world. It is therefore the fundamental layer for all other nfnetlink-enabled user-space programs interfacing with the netfilter subsystem of the Linux kernel.
OpenPCD is a free and open RFID reader reference design platform. The OpenPCD firmware is software that runs in OpenPCD's AT91SAM7 ARM controller, and connects the RFID reader hardware (CL RC632 ASIC) with the Host PC via USB. The Firmware includes a custom USB device stack and drivers for the various embedded AT91SAM7 components. The firmware itself does not run on Linux, but it only works with a Linux host PC talking to it.
librfid is a RFID protocol stack for RFID readers. It implements the reader side of ISO 14443 A and B, ISO 15693, Philips Mifare Ultralight, and Classic. It currently supprorts the Omnikey Cardman 5121 and OpenPCD RFID readers. Support for Philips Pegoda is currently under development. librfid uses libusb and should work on all operating systems that support libusb. Only Linux has been tested.
libmrtd is a library to read and verify information contained in electronic Passports compliant with the ICAO (International Civil Aviation Organization) MRTD (Machine Readable Travel Document) specification. This basically includes all RFID and biometrically enhanced passports issued worldwide.
OsmoSGSN (Serving GPRS Support Node) is the central core network node of a GPRS/EDGE/UMTS cellular network. It is an experimental SGSN implementation, exposing a Gb interface (NS/BSSGP) towards the BSS and the GTP protocol towards the GGSN. It is not yet ready for production use, but primarily for laboratory and research use.
SIMtrace sniffs communication between a mobile phone and a SIM/USIM card. This can be useful for research and analysis, and for developing mobile phone and SIM toolkit (STK) software. The SIMtrace hardware is also capable of MITM (man in the middle) attacks on the SIM-MS communication.
> I don't understand how this is GPL? Can
> anyone explain?
Of course it is GPL. You get the program licensed under GPL if you pay 99 EUR. You then have the right to redistribute it modified or unmodified as often and as long you please. So as soon as one buyer puts it's on his homepage, you will be able to download it for free.