| Company Name | Software Titles |
|---|---|
| Quest | 136 |
| QLogic | 23 |
| Qualcomm | 19 |
| Quark | 15 |
| Questionmark | 12 |
| QlikTech International AB | 9 |
| QuarkXPress | 6 |
| Quickarrow | 6 |
| Quadrant Software | 5 |
| Quest Software Inc. | 5 |
| QAS | 5 |
| Qwest | 5 |
| Quiksoft | 3 |
| Qwizdom | 3 |
| Quantum | 3 |
| QImaging | 3 |
| QuickPen | 2 |
| QSX Software Group | 2 |
| Quinnware | 2 |
| Quadralay | 2 |
| Quest Software | 2 |
| Qarbon | 2 |
| QS-Data Systems | 2 |
| QGIS Development Team | 2 |
| QSI Systems | 2 |