RepRap is a project about democratising and decentralising manufacturing through low-cost open source 3D printers.

3D printers give communities the ability to repair items even when official replacement parts don't exist. They also allow people to produce small runs of custom parts, where more traditional manufacturing methods may be wasteful.

There are obviously issues with sustainability in the 3D printing community, primarily with material source, material recycling/composting, and waste. But even with these current issues, 3D printers provide a lot of utility and may have a place in our solarpunk future.