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RepRap
(reprap.org)
A community for sharing projects that are related to making a more fair and environmentally friendly world.
The subject matter of this community is intended to sit somewhere between slrpnk.net/c/technology and slrpnk.net/c/inperson
A project could be an ongoing community project that someone may want to get involved with or follow, or it could be a DIY project that an individual can do at home.