| 1 | 20,875 | 14,692 | geometry | Geometric primitives and algorithms for Ruby |
| 2 | 51,862 | 32,768 | engineering | Tools for Mad Engineers and those who want to be |
| 3 | 53,955 | 57,055 | jsgf | A parser and DSL for JSGF files |
| 4 | 61,843 | 57,055 | dxf | Read and write DXF files using Ruby |
| 5 | 63,260 | 57,055 | audio | Access all of your audio devices from the comfort of Ruby |
| 6 | 93,566 | 26,560 | stl | Read and write STL files |
| 7 | 93,606 | 57,055 | fasteners | Models for Nuts, Bolts, and Screws |
| 8 | 100,136 | 57,055 | eaglecad | Everything you need to bend Eagle CAD projects to your will |
| 9 | 104,870 | 57,055 | gerber | Tools for working with Gerber and Extended Gerber files |
| 10 | 117,993 | 57,055 | optical | The home of all ruby optics |
| 11 | 118,269 | 57,055 | clips | The C Language Integrated Production System (CLIPS), but in Ruby |
| 12 | 124,463 | 57,055 | canvas | Fingerpainting in Ruby, without the fingers, or the paint |
| 13 | 142,649 | 57,055 | fritzing | Read and write Fritzing sketches |
| 14 | 142,945 | 38,720 | manufacturing | Tools for generating manufacturing drawings and related files |
| 15 | 157,260 | 57,055 | speech | Adventures in the Land of Speech Recognition |
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