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  RepRap is an open source project originally conceived by Dr Adrian Bowyer of Bath University to build a machine that can replicate itself. The Project now has a very active on-line community aiming to produce the world's most versatile self-replicating 3D printer.
  in Tech with 3d opensource printing
• Fab@Home Fabbers
  Fab@Home is a project dedicated to making and using fabbers - machines that can make almost anything, right on your desktop.
  democratize fabhome gallery getting innovation links main model model2beta news overview page software started
  in Hardware with 3d opensource printing prototyping by 3 users
• Free printable staff paper @ Blank Sheet Music .net
  
  Print blank sheet music for free, supports guitar and bass tabs too, ready-to-print sheets in a few seconds, no software to download and install, no watermarks on prints, requires Flash plugin
  alto bass blank free guitar mandolin music notation or piano print printable sheet staff staves tab tablature tabs tenor treble
  in Music with paper printing sheet staff by 12 users
• Shapeways
  passionate about creating you make your own 3D designs come to life using 3D printing
  in Tech with 3d printing by 5 users
• Thingiverse
  Digital Designs for Physical Objects (see "MakerBot Industries" http://www.makerbot.com/)
  in Tech with 3d opensource printing by 4 users

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