| Company Name | Software Titles |
|---|---|
| XIMETA | 2 |
| Xinet | 1 |
| XING AG | 2 |
| Xingtone | 1 |
| Xiph.Org | 3 |
| Xirrus | 1 |
| XLnow | 1 |
| XLNTIdea | 1 |
| Xmark | 1 |
| Xmarks | 2 |
| XMeeting project | 1 |
| XMind | 1 |
| XML Explorer | 1 |
| XMLmind | 1 |
| XMPie | 1 |
| XnSoft | 1 |
| Xobni | 3 |
| xolido | 1 |
| XOsoft | 1 |
| XP Software | 1 |
| XP Systems | 14 |
| Xperience Consulting | 1 |
| XPInstall | 1 |
| XpoLog | 1 |
| XQDC | 1 |
| Xsd2Code | 1 |
| XSManager | 1 |
| Xteq Systems | 1 |
| Xteq Systems-dotec | 1 |
| xThink | 1 |
| Xtranormal | 8 |
| Xtravirt Limited | 2 |
| Xtreme Desktops | 1 |
| XtreMe PCR | 1 |
| Xtreme Soft srl | 1 |
| Xuggle | 1 |
| Xumbrus | 1 |
| xvid | 1 |
| Xvid Team | 1 |
| XviD Team Koepi | 2 |
| XXXXXXXX | 1 |
| XyberSleuth | 1 |
| Xymantix | 1 |
| Xyro B4 Software | 1 |
| Xythos Software | 1 |
| X_Integrated Remote Station W | 1 |
| Y0YS Software | 1 |
| Yahoo | 43 |
| Yahoo! Inc. | 4 |
| YAK | 1 |