From UntangleWiki

This page lists all of the upstream projects used by Untangle.

project name	license	linked	modified	used in	URL
linux kernel	GPL		yes	server	http://kernel.org
debian sarge	GPL/LGPL			server	http://debian.org
iptables	GPL		yes	server	http://netfilter.org
libsysfs	LGPL	yes		uvm	http://linux-diag.sourceforge.net/Sysfsutils.html
hibernate	LGPL			uvm	http://hibernate.org
postgres	BSD			uvm	http://postgresql.org
itext	LGPL or MPL	yes		reports, GUI	http://www.lowagie.com/iText/
apache log4j	apache	yes		uvm	http://logging.apache.org/log4j/docs/
apache tomcat	apache	yes		uvm	http://jakarta.apache.org/tomcat/index.html
jfreechart	LGPL	yes		reports, GUI	http://www.jfree.org/jfreechart/
javamail	Sun	yes		uvm	http://java.sun.com/products/javamail/
libxml2	MIT	yes		uvm	http://xmlsoft.org/
javaWebStart	Sun	yes		uvm	http://java.sun.com/products/javawebstart/
postgresJDBC	BSD	yes		uvm	http://jdbc.postgresql.org/
apache ant	apache	yes		build	http://ant.apache.org/
java JRE 1.6	Sun			uvm/GUI	http://sun.com/java
l7-filter	GPL			protocol control	http://l7-filter.sourceforge.net/
clamav	GPL			virus blocker	http://www.clamav.net/
spamassassin	apache			spam blocker	http://spamassassin.apache.org/
velocity	apache			mail-casing	http://jakarta.apache.org/velocity/
xdoclet	custom			build	http://xdoclet.sourceforge.net/xdoclet/index.html
AJAXTK	mozilla public license			not used yet	http://www.zimbra.com/community/ajaxtk_download.html
bcel	mozilla public license			build	http://jakarta.apache.org/bcel/manual.html
c3p0	LGPL	yes		uvm	http://sourceforge.net/projects/c3p0
OpenVPN	GPL			openvpn	http://openvpn.net/
kaspersky	Kaspersky OEM (pay)			kaspersky virus blocker	http://kaspersky.com/
Ext JS	LGPL			not used yet	http://extjs.com
SARE Rules	Artistic/GPL dual			spam blocker	http://www.rulesemporium.com/
SANE security sigs	Public Domain			phish blocker	http://www.sanesecurity.com/clamav/index.htm
Ruby	Ruby License			Network Configuration	http://www.ruby-lang.org
Ruby on Rails	MIT			Network Configuration	http://www.rubyonrails.org/
Mongrel	Ruby License			Network Configuration	http://www.rubyonrails.org/
libnfnetlink	GPL	yes		uvm	http://www.netfilter.org/projects/libnfnetlink/index.html
libnetfilter_queue	GPL	yes		uvm	http://www.netfilter.org/projects/libnetfilter_queue/index.html
libnetfilter-conntrack	GPL	yes	yes	uvm	http://www.netfilter.org/projects/libnetfilter_conntrack/index.html
sqlite	public domain			uvm	http://www.sqlite.org/
jabsorb	apache		yes	UI	http://jabsorb.org/
jradius	LGPL			Directory Connectory	http://coova.org/JRadius
python-jsonrpc			yes	UVM	http://json-rpc.org/wiki/python-json-rpc