Balancing Chemical Equations

Mathematics
Free - eptsoft

Over 300 highly interactive topics, use with any existing textbook, insert your own values and explore their effects, shows calculations, plots graphs, full colour graphics redrawn to scale for every change, explanatory text, step through topics, even makes revision enjoyable. Plus full colour printing showing your own chosen values, copy and paste to make custom teacher handouts or students course work, modify or add to the text and questions. F

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Solar System 3D Simulator
Free - Science Fair Projects

Solar System 3D Simulator is a FREE software application that generates a realistic solar system model and planets in 3 Dimension on the PC using advanced physics formulas. It can display the planets and their orbits, the sun and the moon. The nine planets including planet earth and their detailed physical & chemical information and image pictures is also displayed including solar power, solar energy and solar eclipse details.

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SimonTools CyberGhost VPN
Free - S.A.D. GmbH

(New! Improved load balancing and server based firewall.) Everyone writes emails, and many are making use of online storage sites, blogging, or sharing their views on web forums. Fortunately, CyberGhost VPN gives users a way to surf anonymously and keep their private information from the eyes of others. CyberGhost VPN provides you with anonymous IP address and encrypts transmissions between you and the web.

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OnScreen DNA Lite
Free - OnScreen Science, Inc.

OnScreen DNA Lite gives everyone a "painless" way to grasp the details of the double helix structure of DNA. This is accomplished by on-screen tutorials that guide you through an exploration of a virtual 3D model. In addition, there is a simulation of DNA denaturation, a laboratory phenomenon important in biotechnology, in which the DNA strands are seen to split apart. These two activities are taken from more advanced editions of the software.

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