| Company Name | Software Titles |
|---|---|
| Zone Labs | 3 |
| Zone.com | 1 |
| ZoneLabs, Inc. | 2 |
| ZONER software | 2 |
| Zoom | 4 |
| ZoomCommerce | 1 |
| Zoomify | 1 |
| Zoosk | 1 |
| ZScrapbook | 1 |
| ZSMC | 1 |
| ZSoft Software | 1 |
| ZTE | 14 |
| ZTekWare | 1 |
| ZTerm David P. Alverson | 1 |
| Zugg Software | 2 |
| Zugo | 2 |
| Zuken | 4 |
| Zultys | 2 |
| Zumesoft | 1 |
| Zwalisoft | 1 |
| ZWCAD Software | 1 |
| Zyl Soft | 1 |
| Zynga | 1 |
| ZyXEL | 3 |
| ZyXEL Communications | 1 |
| ZZJ | 1 |
| _ | 2 |
| _123DMerge | 1 |
| ~RnySmile~ | 1 |