| 1 | 20,874 | 17,932 | geometry | Geometric primitives and algorithms for Ruby |
| 2 | 51,461 | 103,058 | engineering | Tools for Mad Engineers and those who want to be |
| 3 | 53,775 | 25,696 | jsgf | A parser and DSL for JSGF files |
| 4 | 61,364 | 103,058 | dxf | Read and write DXF files using Ruby |
| 5 | 62,557 | 103,058 | audio | Access all of your audio devices from the comfort of Ruby |
| 6 | 92,883 | 103,058 | fasteners | Models for Nuts, Bolts, and Screws |
| 7 | 92,934 | 103,058 | stl | Read and write STL files |
| 8 | 99,398 | 103,058 | eaglecad | Everything you need to bend Eagle CAD projects to your will |
| 9 | 103,996 | 54,325 | gerber | Tools for working with Gerber and Extended Gerber files |
| 10 | 117,081 | 103,058 | optical | The home of all ruby optics |
| 11 | 117,698 | 103,058 | clips | The C Language Integrated Production System (CLIPS), but in Ruby |
| 12 | 123,263 | 103,058 | canvas | Fingerpainting in Ruby, without the fingers, or the paint |
| 13 | 141,106 | 69,179 | fritzing | Read and write Fritzing sketches |
| 14 | 141,456 | 103,058 | manufacturing | Tools for generating manufacturing drawings and related files |
| 15 | 156,375 | 46,026 | speech | Adventures in the Land of Speech Recognition |
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