Richard Horne's Universal Paste Extruder

See the following -

Top Open Innovations in 3D Printing

Open source continues to drive rapid innovation in the 3D printing industry. This makes sense if you stop and think about it—a 3D printer exists to make other things. Combining that philosophy with free software and open source hardware helps other people participate in improving the objects that it makes, and in making the printers faster, smarter, and cleaner. Here are a few of my favorite open source 3D printing innovations from 2016...