Rubik's Cube Software?
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http://software.rubikscube.info/
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Try out Smartdraw for presentations.\nOr Gimp for designing
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You might want to look at watir:\nhttp://wtr.rubyforge.org/
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Try to watch here to search some software with Fibonacci serial numebers:\nhttp://www.google.it/search?hl=it&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=fibonacci+program&spell=1
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See a magic square in\nhttp://en.wikipedia.org/wiki/Magic_square
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A Rube Goldberg machine
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try http://www.freeware.ru
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I don't know if it is the best, but I use the one on the discovery channel.\n\nhttp://puzzlemaker.school.discovery.com/\n\nit works good and my students love the challenge.
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A fun program to work with \nhttp://www.gamemaker.nl/
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Try this site:\n\nhttp://puzzlemaker.school.discovery.com/
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get microsoft visio , comes with offfice xp prof, or sep for bout $100 it has everything youll need and does flowchrts beautifuly.
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Try looking for some softwares at http://www.download.com
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I haven't used it yet but here is the link to get some free 3D software.\n\nhttp://www.anim8or.com
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What about a widget for Towes Of Hanoi?
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Check this professional tool:\n\nhttp://www.opencube.com
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Hi, I am a Chess player (Elo 2400+) and a Computer programmer. GnuChess have C++ Freecode and is very strong.\n\nHave fun!
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Try this open source 3D engine.  It's open source, so it's free:   http://www.ogre3d.org/