| Company Name | Software Titles |
|---|---|
| Zyl Soft | 1 |
| Zittware | 1 |
| Zeataline Projects Limited | 1 |
| ZoomCommerce | 1 |
| Zephyr | 1 |
| Zynga | 1 |
| ZiWu-Soft EDV Systeme GmbH | 1 |
| Zoomify | 1 |
| ZeraWare | 1 |
| Zabaware | 1 |
| Zebra Technologies | 1 |
| Zoosk | 1 |
| Zero-Knowledge Systems | 1 |
| ZyXEL Communications | 1 |
| ZJMedia | 1 |
| ZScrapbook | 1 |
| ZeroSPAM | 1 |
| Zevez | 1 |
| ZZJ | 1 |
| Zeitnitz | 1 |
| ZSMC | 1 |
| Zhengpeng Hou | 1 |
| zanox AG | 1 |
| ZohoCorp | 1 |
| Zelek Software | 1 |
| ZSoft Software | 1 |
| ZhiQing Soft | 1 |
| ZANOX.de AG | 1 |
| Zoiper Communicator Free | 1 |
| Zidsoft | 1 |
| ZANTAZ | 1 |
| Zenilink Media | 1 |
| ZTekWare | 1 |
| ZOLL Medical | 1 |
| Zenith | 1 |
| ZTerm David P. Alverson | 1 |
| ZillaTube | 1 |
| ZIM | 1 |
| Zaval CE Group | 1 |
| Zone Five Software | 1 |
| Zenith Technology Limited | 1 |
| zbgk | 1 |
| ZenJu | 1 |
| ZbSoft | 1 |
| Zone.com | 1 |
| Zenographics | 1 |
| Zion Software | 1 |
| Zenturi | 1 |
| Zumesoft | 1 |
| Zwalisoft | 1 |