Letter X
| xquery | 9 projects |
| XRX | 1 project |
| xscreensaver | 1 project |
| XSD | 5 projects |
| xsettings | 1 project |
| xshape | 1 project |
| XSL | 15 projects |
| XSL Stylesheets | 2 projects |
| XSL/XSLT | 135 projects |
| XSL:FO | 2 projects |
| xslet | 4 projects |
| XSLT | 41 projects |
| xss | 3 projects |
| xterm | 3 projects |
| XText | 3 projects |
| XtremWeb | 1 project |
| XtremWeb-HEP | 1 project |
| Xubuntu | 1 project |
| xul | 11 projects |
| XULRunner | 10 projects |
| xUnit | 1 project |
| XUnit.NET | 1 project |
| xvid | 2 projects |
| xview | 1 project |
| xwork | 1 project |
| xz | 1 project |
