The newest RepRap, RepRap Version II “Mendel”, will be released very shortly. Here is a video of it working. It is both bigger and smaller than RepRap Version I “Darwin”: it can make bigger things, but the machine itself is physically much smaller. It is genuinely a desktop portable 3D printer – you can carry it in one hand. It’s also a lot easier to put together than RepRap Version I “Darwin”. All of Mendel’s printed parts can be printed in Darwin, and, of course, in itself.