Laser Engraver by MichielD99 -- Homemade laser engraver constructed from MDF, an Arduino-based controller, stepper motors, driver boards, and a laser. http://www.homemadetools.net/homemade-laser-engraver
Open Rail is a new open source universal linear rail system designed to be used with various T- Slot aluminum extrusion configurations.
2500mW A3 30x40cm Desktop DIY Violet Laser Engraver Picture CNC Printer Assembling Kits Sale - Banggood.com Más
MakerBot Prints Well with Fewer Clogs—What’s Not to Like?
CoreXY Frame (v.1.0) by Lehaiver - Thingiverse
Atled - invertierter Delta
You can build things with Legos. You can make stuff with toys. But eventually you've got to grow up and build real things. Big things. DonaldJ's PVC Pipe Construction Set makes these things possible. OK, so maybe it's still a toy. But what a toy!