| Sourcefire | 8 | 21 |
| Sourceforge | 15 | 55 |
| Sourcegraph | 2 | 11 |
| Sourcelink | 1 | 1 |
| Sourcenext | 4 | 4 |
| Sourcenext Corporation | 4 | 7 |
| Sourceshock | 1 | 1 |
| Sourcetreesolutions | 1 | 16 |
| Sourceworkshop | 1 | 12 |
| Sourdough | 1 | 1 |
| South Gate Inn Online Reservation System Project | 1 | 2 |
| South Park Token Token Project | 1 | 1 |
| South River | 1 | 3 |
| South River Technologies | 2 | 8 |
| Southrivertech | 1 | 14 |
| Southsoft | 1 | 1 |
| Southwest | 1 | 1 |
| Sowsoft | 1 | 1 |
| Sox | 1 | 12 |
| Soy Cms Project | 1 | 8 |
| Soy Inquiry Project | 1 | 1 |
| Soyal | 8 | 8 |
| Soycms Project | 1 | 5 |
| Sp Rental Manager | 1 | 1 |
| Sp8de | 2 | 2 |
| Spacetag | 1 | 4 |
| Spacetime | 1 | 4 |
| Spacewalk | 1 | 13 |
| Spacewalk Project | 1 | 13 |
| Spacewalkproject | 2 | 14 |
| Spacial Audio Solutions | 2 | 3 |
| Spadeico Project | 1 | 1 |
| Spadepresale Project | 1 | 1 |
| Spaiz | 1 | 1 |
| Spamassassin | 1 | 16 |
| Spambot Module Project | 1 | 1 |
| Spamdyke | 1 | 3 |
| Spaminator | 1 | 1 |
| Spamoborona | 1 | 1 |
| Spamtitan | 2 | 27 |
| Sparkdevnetwork | 1 | 3 |
| Sparkjava | 1 | 31 |
| Sparklabs | 1 | 3 |
| Sparkleblog | 1 | 1 |
| Sparklemotion | 3 | 13 |
| Sparkpay | 1 | 1 |
| Sparksolutions | 1 | 7 |
| Sparksuite | 1 | 2 |
| Spassarop | 1 | 1 |
| Spatie | 2 | 5 |
| Spaw Editor | 1 | 1 |
| Spawar.navy.mil | 1 | 1 |
| Spb | 1 | 2 |
| Spbas | 1 | 2 |
| Spc Cloud | 1 | 1 |
| Spdk | 1 | 3 |
| Speakout! Email Petitions Project | 1 | 1 |
| Spearhead | 2 | 2 |
| Speartek | 1 | 1 |
| Specialk | 4 | 7 |
| Specklesystems | 1 | 1 |
| Specotech | 1 | 5 |
| Specter | 1 | 1 |
| Spectrum | 2 | 2 |
| Spectrumcu | 1 | 1 |
| Specview | 1 | 1 |
| Speechio | 1 | 1 |
| Speed Software | 2 | 2 |
| Speed Test Project | 1 | 1 |
| Speed-dreams | 1 | 1 |
| Speedberg | 1 | 1 |
| Speedbit | 2 | 4 |
| Speedcashtoken Project | 1 | 1 |
| Speedproject | 3 | 10 |
| Speedtech | 2 | 22 |
| Speedtouch | 1 | 1 |
| Speedxess | 1 | 1 |
| Speedywiki | 1 | 3 |
| Spencer Christensen | 1 | 1 |
| Spencer Miles | 1 | 3 |
| Spey | 1 | 3 |
| Sphere.xlentprojects | 1 | 1 |
| Spheredev | 1 | 1 |
| Sphider | 1 | 14 |
| Sphider-plus | 1 | 4 |
| Sphiderpro | 1 | 4 |
| Sphinx-soft | 1 | 1 |
| Sphinxsearch | 1 | 3 |
| Sphpblog | 1 | 5 |
| Sphpell | 1 | 1 |
| Spi Dynamics | 1 | 2 |
| Spi-inc | 1 | 4 |
| Spice Classifieds | 1 | 1 |
| Spice Project | 1 | 15 |
| Spice-gtk Project | 1 | 5 |
| Spice-space | 2 | 6 |
| Spicethemes | 1 | 1 |
| Spiceworks | 2 | 133 |
| Spid | 1 | 2 |
| Spidean | 3 | 3 |
