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Visuwords™ online graphical dictionary - Look up words to find their meanings and associations with other words and concepts. Produce diagrams reminiscent of a neural net. Learn how words associate. Enter words into the search box to look them up or double-click a node to expand the tree. Click and drag the background to pan around and use the mouse wheel to zoom. Hover over nodes to see the definition and click and drag individual nodes to move them around to help clarify connections. * It's a dictionary! It's a thesaurus! * Great for writers, journalists, students, teachers, and artists. * The online dictionary is available wherever there's an internet connection. * No membership required. Visuwords™ uses Princeton University's WordNet, an opensource database built by University students and language researchers. Combined with a visualization tool and user interface built from a combination of modern web technologies, Visuwords™ is available as a free resource to all patrons of the web.

"At Google we have experts on everything from Python to penguins. However, connecting our expert teachers to eager students around the globe can be a complicated business. To that end, we are excited to release our new internal learning platform, CloudCourse under an open source license. Built entirely on App Engine, CloudCourse allows anyone to create and track learning activities. CloudCourse also offers calendaring, waitlist management and approval features.\n\nCloudCourse is fully integrated with Google Calendar and can be further customized for your organization with the following service provider interfaces (replaceable components):\n\n * Sync service - to sync CloudCourse data with your internal systems\n * Room info service - to schedule classes in your locations\n * User info service - to look up user profile (employee title, picture, etc)\n\nCloudCourse has been developed in Python, using the Django web application framework and the Closure Javascript library. Deploying CloudCourse on App Engine is a breeze, and should take less than 5 minutes."

Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License.

Open source alternative to Pixie