RepRap

The RepRap project started as an international initiative coordinated by Dr. Adrian Bowyer at the University of Bath in the UK to develop a 3D printer that could print most of its own components at low-cost. RepRap (short for replicating rapid prototyper) used an additive manufacturing technique called fused filament fabrication (FFF) to lay down material in layers. One of the companies commercializing the project closed in January 2016.