[Holy cow.  Can you imagine a time when a person could singlehandedly have made a comprehensive list of all open source 3D printers in an afternoon?]

Here’s a list of all of the RepRap, RepStrap, and MakerBot open source 3d plastic FDM 3d printers I can find.  When possible I’ve tried to link to the official site, helpful derivative sites, instructions, and parts.  I’ve also included some notes.

1. RepRap – The ultimate in DIY personal fabrication technology.  Source everything yourself and put it together!
   1. Mendel –
      1. parts on ebay
      2. bearings – http://www.vxb.com/page/bearings/PROD/kit9060
2. Darwin –
   1. Ponoko Darwin Acrylic lasercut parts – http://www.ponoko.com/showroom/reprap/free-acrylic-reprap-v1-1–2083
3. Mini-Mendel
4. Isaac Mendel http://isaac-mendel.blogspot.com/
5. Fab@Home
6. MakerBot –
7. McWire – http://reprap.org/wiki/McWire_Cartesian_Bot_1_2#This_project_is_no_longer_actively_developed.___For_newer_mcwire_info.2C_please_see_http:.2F.2Fobjects.reprap.org.2Fwiki.2FDevelopment:McWire
8. ShaperCube –
   1. http://wiki.shapercube.com/wagn/Shapercube_Assembly
9. Profound Devices –
   1. http://www.profounddevices.com/
10. RepMan –
    1. http://www.bitsfrombytes.com/index.php?page=shop.product_details&product_id=168&category_id=5&flypage=flypage-ask.tpl&option=com_virtuemart&Itemid=100005
11. Tommilese –

1. The Lost Blog Posts
2. Plastruder! [Draft 12/25/2009]
3. UNTITLED [Draft 12/25/2009]
4. Preparing to print [Draft 12/27/2009]
5. More prints [Draft 01/04/2010]
6. Prototype Pricing [Draft 01/19/2010]
7. MakerBot tuning [Draft 01/20/2010]
8. Plastic Screw Anchor [Draft 02/02/2010]
9. Magic [Draft 02/03/2010]
10. How are you printing with PLA? [Draft 02/16/2010]
11. Rebuilding my extruder [Draft 02/16/2010]
12. MY robot [Draft 02/18/2010]
13. more things i learned [Draft 02/20/2010]
14. First commissioned piece! [Draft 02/22/2010]
15. MakerBot: Toy or Tool? [02/25/2010]
16. Idea for Skeinforge settings… [Draft 03/27/2010]
17. RepRap and MakerBot alternatives [Draft 04/05/2010]
18. RepRap Parts for Sale [Draft 04/07/2010]