| Company Name | Software Titles |
|---|---|
| Question Writer | 1 |
| Questionmark | 12 |
| Questra | 1 |
| QueTek Consulting | 1 |
| Quick Hit | 1 |
| Quick-PDF.com | 1 |
| Quickarrow | 6 |
| QuickPDF | 1 |
| QuickPen | 2 |
| QuickTime Installer for OS X | 1 |
| Quiksoft | 3 |
| Quinnware | 2 |
| Quintum Technologies | 1 |
| Quizulous | 1 |
| Quorum Software | 1 |
| QuorumLabs | 1 |
| Qurb | 1 |
| QuteCom | 1 |
| QwertyLab | 1 |
| Qwest | 5 |
| Qwizdom | 3 |