| Xtermjs | 1 | 1 |
| Xpvm | 1 | 1 |
| Xs4all | 1 | 1 |
| Xplico | 1 | 1 |
| Xonix | 1 | 1 |
| Xtalk Project | 1 | 1 |
| Xt-stats | 1 | 1 |
| Xsplit | 1 | 1 |
| Xpweb | 1 | 1 |
| Xorur | 2 | 1 |
| Xorp | 1 | 1 |
| Xrlly Software | 3 | 1 |
| Xperience | 1 | 1 |
| Xplodphp | 1 | 1 |
| Xpilot | 1 | 1 |
| Xornic | 1 | 1 |
| Xorg | 1 | 1 |
| Xss Hunter Express Project | 1 | 1 |
| Xsjczx | 1 | 1 |
| Xrootd | 1 | 1 |
