| Z-Cron | 1 | 1 |
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| Z.Cash | 1 | 3 |
| Zaal | 1 | 3 |
| Zabbix | 7 | 91 |
| Zack Coburn | 1 | 1 |
| Zack Smith | 1 | 1 |
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| Zahiraccounting | 1 | 1 |
| Zahmit Design | 1 | 1 |
| Zainu | 1 | 2 |
| Zaireweb Solutions | 1 | 1 |
| Zak B Elep | 1 | 1 |
| Zakkis | 1 | 1 |
| Zakkis Technology Corporation | 1 | 1 |
| Zakon Group | 1 | 1 |
| Zakongroup | 1 | 1 |
| Zalando | 1 | 2 |
| Zalify | 1 | 1 |
| Zalora | 1 | 1 |
| Zammad | 1 | 71 |
| Zanematthew | 1 | 3 |
| Zanfi Solutions | 3 | 7 |
| Zangband-Data Project | 1 | 1 |
| Zanllp | 1 | 1 |
| Zapier | 1 | 1 |
| Zapms | 1 | 1 |
| Zapping | 1 | 1 |
| Zarafa | 4 | 16 |
| Zatzlabs | 1 | 2 |
| Zauner | 1 | 4 |
| Zaunz Gmbh | 1 | 2 |
| Zavedil | 1 | 1 |
| Zaver Project | 1 | 1 |
| Zavio | 13 | 63 |
| Zaygo | 2 | 2 |
| Zaytech | 1 | 9 |
| Zazzle | 1 | 1 |
| Zbar Project | 1 | 2 |
| Zbattle.Net | 1 | 1 |
| Zblast | 1 | 1 |
| Zblogcn | 2 | 21 |
| Zbsoft | 1 | 2 |
| Zbt | 1 | 3 |
| Zbzcms | 1 | 7 |
| Zcbs | 1 | 1 |
| Zcfees Project | 1 | 1 |
| Zchunk | 1 | 1 |
| Zclassic | 1 | 1 |
| Zcms Project | 1 | 4 |
| Zdaemon | 1 | 3 |
| Zdir Project | 1 | 1 |
| Zdstatistics Project | 1 | 1 |
| Zeacom | 1 | 1 |
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| Zealousweb | 2 | 5 |
| Zebedee | 1 | 1 |
| Zebra | 10 | 14 |
| Zebrafeeds | 1 | 1 |
| Zechat Project | 1 | 1 |
| Zed-3 | 1 | 2 |
| Zediious | 1 | 1 |
| Zedna Ebook Download Project | 1 | 1 |
| Zeek | 1 | 2 |
| Zeen101 | 1 | 1 |
| Zeenshare Project | 1 | 1 |
| Zeescripts | 3 | 4 |
| Zeesweb | 1 | 1 |
| Zeeways | 7 | 11 |
| Zehnet | 1 | 1 |
| Zeit | 2 | 9 |
| Zekewalker | 1 | 1 |
| Zemana | 2 | 3 |
| Zemanta | 2 | 5 |
| Zen Cart | 2 | 16 |
| Zen Help Desk Software | 1 | 1 |
| Zen Mobile App Native Project | 1 | 1 |
| Zen Project | 1 | 1 |
| Zen-Cart | 1 | 27 |
| Zenas | 4 | 5 |
| Zenbership | 1 | 1 |
| Zend | 21 | 85 |
| Zend-Blog-2 Project | 1 | 1 |
| Zendesk | 4 | 4 |
| Zendocs | 1 | 1 |
| Zendrop | 1 | 2 |
| Zengenti | 1 | 1 |
| Zenhelpdesk | 1 | 1 |
| Zenitel | 2 | 3 |
| Zenmate | 1 | 1 |
| Zenml | 1 | 7 |
| Zeno Font Resizer Project | 1 | 1 |
| Zenoss | 3 | 26 |
| Zenphoto | 1 | 31 |
| Zenprise | 1 | 1 |
| Zenspider | 1 | 1 |
| Zenstruck | 1 | 1 |
| Zentao | 1 | 4 |
| Zentracking | 1 | 1 |
| Zenturi | 1 | 4 |
