Third Party Libraries

Library	Version	Description	GPL-Compatible?	Covered under FLOSS exception?
Apache Portable Runtime	1.2.8	A set of C functions which provide a portable and consistent interface into operating system - or simply widely useful - functionality. We primarily use it for threading and socket i/o. This is actually three packages, apr, apr-util and apr-iconv.	No, Apache 2.0 license	Yes
Boost	1.32.0	A set of portable C++ libraries which provide a wide set of functionality. Used primarily for tokenization.	Yes, BSDish
c-ares	1.3.2	Performs DNS requests and name resolves asynchronously. Used with libcurl to keep all HTTP operations async.	Yes, BSDish
CG	??	cg controls some visual effects. - NOT USED BY THE NORMAL CLIENT.	No, permissive license but forbids reverse engineering.	No
ELFIO	1.0.3	Enhanced stacktrace information on the Linux client.	Yes, LGPL
Expat	1.95.8	XML parser.	Yes, MIT
FMOD	3.75	Audio engine and mp3 stream decoder	No, proprietary	No
FreeType	2.1.5	Font engine.	Yes, dual licensed BSD/Advertising + GPL
Glib	2.0.7	??	Yes, LGPL
GTK+	2.0.9	'Native' UI components on the Linux client.	Yes, LGPL
jpeglib	6b	JPEG decoder library.	Yes, BSD
KDU	5.2.1	Kakadu (KDU) JPEG-2000 decoder library.	No, Proprietary
libcurl	7.16.0	Handles moving data across the net in many different protocols. Used to GET/POST/PUT/DELETE web resources.	Yes, MIT
libuuid	??	Generates UUIDs under Linux. Originally a part of the ext2fs filesystem. Also see lluuid.cpp for all platforms.	Yes, LGPL
llMozLib	1.8.0.9	llMozLib handles rendering HTML in the viewer via an embedded Gecko (Mozilla) engine.	Yes, MPL/GPL/LGPL Tri-license
Mesa	6.2.1	Provides the required OpenGL headers under Linux.	Yes
OGG	1.0.3	Audio control.	Yes, BSDish
OpenGL	??	3D Graphics rendering engine.	Yes (see SGI's FAQ)
OpenJPEG	1.0	An open-source JPEG-2000 library; a slower alternative to Kadaku. Used in the open source release	Yes, however one must beware of patents.
OpenSSL	0.9.7c	Provides encryption for sensitive actions such as user login	No, advertising clauses.	Yes
qLab	0.0.2	build environment for unix-like operating systems that provides library-like support via #include/#define (via the c-preprocessor) and makefiles. it contains libraries for command-line parsing (getopt()) and dynamic prim manipulation.	?	?
Quicktime	7.13	Used to play in-world video clips on a prim.	No, Proprietary	No
SDL	1.2.7	The Simple DirectMedia Layer libraries are used for handling input and basic window/GL setup on the Linux client.	Yes
Smartheap	??	Memory allocation (Windows only malloc() replacement)	No, Proprietary, but entirely optional (easy to comment out)	No
TUT	2006-06-22	Unit test framework based on the use of c++ meta template programming. Used to test LL libraries.	Yes, BSD
Vorbis	1.1.2	Audio control.	Yes
xmlrpc-epi	0.51	Controls the XML-RPC protocol.	Yes, BSD
zlib	1.2.1	zlib is a lossless data-compression library which is used for a variety of network i/o and file compression.	Yes, MIT-like