Unofficial Categories for Mentoring Organizations Participating in Google Summer of Code 2008

To help students pick interesting projects out of the haystack of goofy names. Find official list here and wiki version here.
Operating Systems
Debian (ideas)
Dept. of Computer Science, Vrije Universiteit (ideas)
DragonFly BSD Project (ideas)
ES operating system (ideas)
The Fedora Project & JBoss.org (ideas)
The FreeBSD Project (ideas)
Gentoo (ideas)
GNU Hurd (ideas)
GNU Project (ideas)
Haiku (ideas)
The Linux Foundation (ideas)
The NetBSD Project (ideas)
openSUSE (ideas)
Pardus project (ideas)
RTEMS Project (ideas)

OS Enhancements
coresystems GmbH (ideas)
The Enlightenment Project (ideas)
Etherboot Project (ideas)
GNOME (ideas)
KDE (ideas)
OpenAFS (ideas)
The SYSLINUX Project (ideas)
The Wine Project (ideas)
The X.Org Foundation (ideas)
Zumastor (ideas)

Security
The Electronic Frontier Foundation (ideas)
Nmap Security Scanner (ideas)
Open Security Foundation (OSVDB) (ideas)
OSSIM: Open Source Security Information Management (ideas)

Human Computer Interfaces
Natural User Interface Group (ideas)

Mobile, Handheld & Hands-free Devices
BlueZ (ideas)
OpenInkpot (ideas)
OpenMoko Inc. (ideas)
Rockbox (ideas)

Programming Languages, Libraries, Toolkits & Compilers
Boost C++ (ideas)
Comprehensive C Archive Network (CCAN) (ideas)
GCC (ideas)
Haskell.org (ideas)
Hypertriton, Inc. (ideas)
International Components for Unicode (ideas)
Jato (ideas)
The Java PathFinder Team (ideas)
Jikes RVM (ideas)
LispNYC (ideas)
LLVM Compiler Infrastructure (ideas)
MacPorts (ideas)
Mono Project (ideas)
The Perl Foundation (ideas)
PHP (ideas)
Python Software Foundation (ideas)
Ruby Central (ideas)
The Squeak Project (ideas)
SWIG (ideas)
Tcl/Tk Community (ideas)
TeX Users Group (ideas)
Translate Toolkit & Pootle (ideas)
wxPython (ideas)
wxWidgets (ideas)

Version Control System
Git Development Community (ideas)
Mercurial (a project of the Software Freedom Conservancy) (ideas)
Subclipse (ideas)
Subversion (ideas)

Development Framework
argouml (ideas)
Codehaus (ideas)
The Eclipse Foundation (ideas)
GNUstep (ideas)
PostNuke Application Framework (ideas)
Project Hackystat (ideas)

Build Systems
SCons next-generation build system (ideas)

Databases
eXist (ideas)
MySQL (ideas)
PostgreSQL project (ideas)

Free & Open Source Development
The Apache Software Foundation (ideas)
The Free Software Initiative of Japan (ideas)
Ohloh Corporation (ideas)
Open Source Applications Foundation (ideas)
Oregon State University Open Source Lab (OSU OSL) (ideas)
Portland State University (ideas)
The Software Freedom Conservancy (ideas)
WinLibre (ideas)

GRIDs, Clusters & Supercomputing
The Globus Alliance (ideas)
NCSA - The National Center for Supercomputing Applications at the University of Illinois (ideas)
OAR (ideas)
Ohio Supercomputer Center (ideas)
OMII-UK (ideas)
OSCAR (ideas)

Network Technologies
Freenet Project Inc (ideas)
Internet2 (ideas)
The ns-3 Project (ideas)
OpenNMS (ideas)
Umit (ideas)

Coordination and Collaboration Environments
Sahana (ideas)
Sakai Foundation and IMS Global Learning Consortium (ideas)
Web Technologies
Google
MoinMoin Wiki Project (ideas)
The Mozilla Project (ideas)
NetSurf (ideas)
The WebKit Open Source Project (ideas)
Wikimedia Foundation (ideas)
WordPress (ideas)
XWiki (ideas)

Web Development
Django (ideas)
Dojo Foundation (ideas)
OpenQA (ideas)
TurboGears (ideas)
Zope Foundation, Inc (ideas)

Content Management
Drupal (ideas)
DSPACE FOUNDATION (ideas)
Geeklog (ideas)
Internet Archive (ideas)
Joomla! (ideas)
MetaBrainz Foundation Inc. (ideas)
Moodle (ideas)
PlanetMath.org, Ltd. (ideas)
Plone Foundation (ideas)

Application Suites
Ingres (ideas)
One Laptop per Child (ideas)
Pentaho (ideas)
Samba (ideas)

Office Applications & Text Editors
AbiSource (ideas)
Gnumeric (ideas)
Vim (ideas)

NGO Community Development
ChristmasFuture (ideas)

Educational Software
Tux4Kids (ideas)
University of Zurich (ideas)

Simulations, Modeling, Neural Networks & AI
Center for the Study of Complex Systems (CSCS), University of Michigan (ideas)
Ptolemy Project, University of California at Berkeley (ideas)
Singularity Institute for Artificial Intelligence (ideas)
Swarm Development Group (SDG) (ideas)

Bioinformatics, Biology & Health Care
GenMAPP (ideas)
NESCent - National Evolutionary Synthesis Center (ideas)
OpenMRS (ideas)
Plazi Verein (ideas)

Statistics
R Foundation for Statistical Computing (ideas)

Science, Engineering & CAD
BRL-CAD (ideas)
The gEDA Project (ideas)

Images, Graphics, Layout & Animation
Blender Foundation (ideas)
Cairo (ideas)
Crystal Space (ideas)
GIMP - GNU Image Manipulation Program (ideas)
Inkscape (ideas)
K-3D (ideas)
OGRE (ideas)
OpenICC (ideas)
Scribus Team (ideas)

Games & Game Development
Battle for Wesnoth (ideas)
BZFlag (ideas)
Linden Lab (ideas)
ScummVM (ideas)
Simple DirectMedia Layer (ideas)
Thousand Parsec (ideas)
WorldForge (ideas)

Mail, Phone & Instant Messaging
Adium (ideas)
OpenChange (a project of the Software Freedom Conservancy) (ideas)
Pidgin (ideas)
SIP Communicator (ideas)
XMPP Standards Foundation (ideas)

Publishing & Copyright
Creative Commons (ideas)

Multimedia
BBC Research (ideas)
FFmpeg (ideas)
GStreamer (ideas)
Neuros Technology (ideas)
XBMC (ideas)
Xiph.org Foundation (ideas)

GPS & Geospatial
OpenStreetMap (ideas)
OSGeo - Open Source Geospatial Foundation (ideas)

Audio & Music
atheme.org (ideas)
Audacity (ideas)
CLAM ( at the Universitat Pompeu Fabra) (ideas)
Mixxx (ideas)
XMMS2 - X(cross)platform Music Multiplexing System (ideas)

Video & TV
Dirac Schrodinger (ideas)
VideoLAN (ideas)

Photography
Coppermine Photo Gallery (ideas)
Gallery (ideas)
hugin/panotools (ideas)