| Operating system | Developer | First release |
|---|---|---|
| Salix OS | — | — |
| SharpOS | — | — |
| ShredOS | — | — |
| SmoothWall | — | — |
| Trinux | — | — |
| UKnow4Kids | — | — |
| Visopsys | — | — |
| VyOS | — | — |
| Operating system | Developer | First release |
|---|---|---|
| Salix OS | — | — |
| SharpOS | — | — |
| ShredOS | — | — |
| SmoothWall | — | — |
| Trinux | — | — |
| UKnow4Kids | — | — |
| Visopsys | — | — |
| VyOS | — | — |