| Company Name | Software Titles |
|---|---|
| ZZJ | 1 |
| ZyXEL Communications | 1 |
| ZyXEL | 3 |
| Zynga | 1 |
| Zyl Soft | 1 |
| ZWCAD Software | 1 |
| Zwalisoft | 1 |
| Zumesoft | 1 |
| Zultys | 2 |
| Zuken | 4 |
| Zugo | 2 |
| Zugg Software | 2 |
| ZTerm David P. Alverson | 1 |
| ZTekWare | 1 |
| ZTE | 14 |
| ZSoft Software | 1 |
| ZSMC | 1 |
| ZScrapbook | 1 |
| Zoosk | 1 |
| Zoomify | 1 |
| ZoomCommerce | 1 |
| Zoom | 4 |
| ZONER software | 2 |
| ZoneLabs, Inc. | 2 |
| Zone.com | 1 |
| Zone Labs | 3 |
| Zone Five Software | 1 |
| Zondervan | 4 |
| ZOLL Medical | 1 |
| ZOLL Data Systems | 6 |
| Zoiper Communicator Free | 1 |
| ZohoCorp | 1 |
| ZOHO | 5 |
| ZJMedia | 1 |
| ZixCorp | 5 |
| ZiWu-Soft EDV Systeme GmbH | 1 |
| Zittware | 1 |
| ZipGenius | 1 |
| Zipclix | 1 |
| Zion Software | 1 |
| Zinio | 4 |
| Zimbra | 3 |
| ZIM | 1 |
| ZillaTube | 1 |
| Ziff-Davis Media | 7 |
| Zidsoft | 1 |
| ZhiQing Soft | 1 |
| Zhengpeng Hou | 1 |
| Zevez | 1 |
| ZeroSPAM | 1 |