They're the counterparts to the first pieces of the "next generation" netfilter
subsystem that will be present in the 2.6.14 linux kernel release.

libnfnetlink-0.0.11
	ftp://ftp.netfilter.org/pub/libnfnetlink/libnfnetlink-0.0.11.tar.bz2
	This is the low-level communications library

libnetfilter_log-0.0.10
	ftp://ftp.netfilter.org/pub/libnetfilter_log/libnetfilter_log-0.0.10.tar.bz2
	This is the userspace library for nfnetlink_log in 2.6.14
	It is used by the upcoming ulogd-2.00beta release
	Needs libnfnetlink-0.0.11

libnetfilter_queue-0.0.10
	ftp://ftp.netfilter.org/pub/libnetfilter_queue/libnetfilter_queue-0.0.10.tar.bz2
	This is the userspace library for nfnetlink_queue in 2.6.14
	It is used by applications that traditionally used libipq
	NuFW already has a working port
	Needs libnfnetlink-0.0.11

libnetfilter_conntrack-0.0.20
	ftp://ftp.netfilter.org/pub/libnetfilter_conntrack/libnetfilter_conntrack-0.0.20.tar.bz2
	This is the userspace library for the ip_conntrack netlink interface
	It is currently only used by the conntrack program (see below)
	Needs libnfnetlink-0.0.11

conntrack-0.90
	ftp://ftp.netfilter.org/pub/conntrack/conntrack-0.90.tar.bz2
	The userspace connection tracking table administration program
	Needs libnetfilter_conntrack-0.0.20

and :

ulogd-1.23
       http://ftp.netfilter.org/pub/ulogd/

ulogd is a replacement for traditional syslog-based logging (using the LOG
target) in iptables-based firewalls. ULOG/ulogd has a different concept. Packets
get copied to a special logging daemon, which can do very detailed logging to
different targets (plaintext files, MySQL databases, ...). ulogd supports
plugins for different output formats, as well as for new protocols/..

-thanks-