| ID | Name | Type |
|---|---|---|
| #13592 | Source Software Ltd | Z |
| #18044 | Source Solutions, Inc. | P |
| #16031 | Source the Software House | P |
| #13594 | South Coast | Z |
| #17763 | South Wales Software | S |
| #13595 | Southern Educational Software | Z |
| #13596 | Southern Software | Z |
| #13597 | Southway Software | Z |
| #13598 | Sovereign Software | Z |
| #22813 | SoyKhaler | + |
| #13599 | Soyuzmultfilm | Z |
| #13600 | Sp. Sonderheft | ? |
| #13601 | Space Age Software | Z |
| #16647 | Space Poison | Z |
| #22552 | SpaceWhale | P |
| #18494 | Spacefractal | + |
| #13602 | Spaceman Ltd | Z |
| #13603 | Spacesoft | Z |
| #13604 | Spark | ? |
| #13605 | Spark Software | Z |