知識・教養サイト KNOWLEDGE 2.0

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Blinkbits - Share knowledge. http://www.blinkbits.com/
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Brainreactions - Participate in brainstorms & share ideas. http://www.brainreactions.net/
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Copyscape - Manage rights online. http://www.copyscape.com/
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Echosign - Contract management. http://www.echosign.com/public/compose
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Grokker - Enterprise search & knowledge management. http://www.grokker.com/
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Hanzoweb - Bookmark, tag & share knowledge online. http://hanzoweb.com/
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Jots - Information sharing. http://www.jots.com/
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Kaboodle - Information sharing. http://www.kaboodle.com/
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Oyogi - Share Q&A. http://www.oyogi.com/
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Postgenomic* - Share & rank life science knowledge. http://www.postgenomic.com/
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Pubsub - Match your interests with new info. http://www.pubsub.com/
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Root/vaults* - Store, manage & share knowledge online. http://www.root.net/vaults/
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Squidoo - Share knowledge. http://www.squidoo.com/
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Tractis - Negotiate & sign contract, solve disputes online. http://www.tractis.com/
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Wondir - Share Q&A. http://www.wondir.com/
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Yahooanswers - Share Q&A. http://answers.yahoo.com/