The Google Summer of Code (GSOC) is a progam that has helped many open source projects. Google accepts applications from projects and provides up to $150,000 in stipends to help student developers contribute code.

Since it started in 2005, Google estimates that GSOC,

has brought together over 8,500 successful student participants from 101 countries and over 8,300 mentors from over 109 countries worldwide to produce over 50 million lines of code.

Last year, there was a 10% increase in the program to commemorate its 10th anniversary.

This year, there was been far more significant decrease in the size of the program. The number of accepted projects dropped from 190 last year to 137 this year - the lowest number for many years.

After seeing reaction to the news on Twitter, I compared the list of accepted projects in 2015 to the list from 2014. It appears that over 130 projects were dropped and over 80 new projects added.

Some the biggest names in open source weren't accepted this year, including Mozilla, WordPress, the Linux Foundation and the Tor Project. There's also a smaller group of exciting new projects that are getting GSOC support for the first time.

The Winners: In GSOC 2015, but not last year

Africa Soil Information Service ASCEND Bika Open Source LIMS Collective Boston University / XIA CentOS Project Cesium Community CloudCV Department of Biomedical Informatics, Stony Brook University Encyclopeida of Life FFmpeg Foundation for Learning Equality FreeBSD GitHub Global Alliance for Genomics & Health GNU Mailman Google Kubernetes HPCC Systems® Interactive Spaces International GeoGebra Institute International Neuroinformatics Coordinating Facility IP-over-P2P Project JBoss Community JdeRobot - Universidad Rey Juan Carlos jQuery Foundation LabLua lowRISC MariaDB MBDyn, Department of Aerospace Engineering at the Polytechnic University of Milan MEDES-IMPS MinnowBoard Project MIT Media Lab Network Time Foundation NumFOCUS OncoBlocks OpenStreetMap Openwall P2PSP.org PaGMO / PyKEP Pencil Code Foundation Pidgin, Finch, and libpurple PLASMA @ UMass Portable Native Client PostgreSQL Project QEMU R Project for Statistical Computing Red Hen Lab RIOT RoboComp RouteFlow Rspamd spam filtering system RTEMS Project Ruby Ruby on Rails Sage Mathematical Software System Saros Scilab Enterprises Sustainable Computing Research Group ( SCoRe ) TARDIS SN TEAMMATES @ National University of Singapore The Honeynet Project The STE||AR Group The syslog-ng project The Visualization Toolkit The Wine Project Tox Foundation Tux4Kids University of Nebraska - Helikar Lab X.Org Foundation XBMC Foundation Xiph.Org Foundation XMPP Standards Foundation

The Disappointed: In GSOC 2014, but not this year

AerospaceResearch.Net Amahi Apertium appleseed Arches Project Association Tatoeba Battle for Wesnoth Benetech Bio4j BioJavaScript Biomedical Informatics, Emory University Blender Foundation Bookie Boost C++ Libraries BRL-CAD Buildroot BumbleBee Autonomous Underwater Vehicle (BBAUV) Catrobat (formerly Catroid Project) Centre for Computational Medicine, SickKids Research Institute Ceph Checkstyle CodeCombat CodeMirror Computational Science and Engineering at TU Wien coreboot Crypto Stick Crystal Space Dr. Memory Flowgrammable Freenet Project Inc Freifunk Frenetic Gambit: Software Tools for Game Theory Ganglia Gentoo Foundation GNOME GNSS-SDR GNU Octave GNU Project GNU Radio Grameen Foundation - MOTECH Groovy Community Haiku Health Information Systems Programme HelenOS group at Department of Distributed and Dependable Systems, Charles University in Prague illumos Inclusive Design Institute Inkscape International Neuroinformatics Coordinating Facility Italian Mars Society JBoss Community Jitsi jMonkeyEngine Joomla! KolibriOS Project Team Laboratory for Cosmological Data Mining LEAP Encryption Access Project LibreOffice Linaro Linux Trace Toolkit next generation project (LTTng) LyX – The Document Processor Measurement Lab (M-Lab) Melange Mifos Initiative Mixxx DJ Software mlpack: scalable C++ machine learning library Monkey Project Mozilla MuseScore National Resource for Network Biology (NRNB) Netfilter Project NetSurf OGDF - Open Graph Drawing Framework Open Bioinformatics Foundation Open Education Resource Foundation Open Lighting Project Open Motion Planning Library openSUSE OSv oVirt OWASP Foundation phpBB Forum Software Plan 9 from Bell Labs Plone Foundation Point Cloud Library (PCL) PRISM Model Checker Project Tox Public Laboratory for Open Technology and Science QEMU R Project for Statistical Computing Raxa RouteFlow RTEMS Project Sahana Software Foundation Scaffold Hunter ScummVM Shogun Machine Learning Toolbox Sigmah Software Freedom Conservancy, Inc. Steel Bank Common Lisp Stratosphere Project SuperTuxKart Swathanthra Malayalam Computing SymPy SyncDiff(erent) The CGAL Project The Julia Language The Linux Foundation The OpenStack Foundation The Perl Foundation The Privly Foundation The STE||AR Group The syslog-ng project The Tor Project and EFF The Wiselib ThinkUp TimVideos.us Twitter TYPO3 Association Visualization Toolkit (VTK) Wikimedia WordPress WorldForge WSO2 wxWidgets Xapian Search Engine Library Xen Project

What are your thoughts on these changes?

First, apologies if I made any errors in comparing these too lists - I probably missed one or two. Please feel free to correct me in the comments.

Second, I can't see any clear patten to which projects were accepted and which weren't, but let me know if you can.