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Welcome to Celestia ... The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X. Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy. All movement in Celestia is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across. A 'point-and-goto' interface makes it simple to navigate through the universe to the object you want to visit. Celestia is expandable. Celestia comes with a large catalog of stars, galaxies, planets, moons, asteroids, comets, and spacecraft. If that's not enough, you can download dozens of easy to install add-ons with more objects.

Online journal looking at Reusable Learning Objects in Education

Real Easy 100's of thoughtful features to make creately diagramming quick and natural, its a joy to use. Beautiful Diagrams One click styling, pretty shapes, curvy connectors and more helps you create beautiful diagrams. Team Collaboration Powerful project collaboration, inline commenting, one click publishing and team management. Smart Diagramming Smart diagrams and objects suggests connectors, draws as you type and adds data to your diagrams.

The Xerte Project provides a full suite of tools for elearning developers and content authors. Xerte is a fully-featured elearning development environment for creating rich interactivity. Xerte Online Toolkits is a server-based suite of tools for content authors. Elearning materials can be authored quickly and easily using browser-based tools, with no programming required.

Connexions is a place to view and share educational material made of small knowledge chunks called modules that can be organized as courses, books, reports, etc. Anyone may view or contribute: * authors create and collaborate * instructors rapidly build and share custom collections * learners find and explore content