# Non-primary applications

IncusOS uses non-primary applications to enhance the functionality of a primary application or provide debugging support.

```{tip}
You can install any of the non-primary applications on an IncusOS system by running

    incus admin os application add -d '{"name":"<application name>"}'
```

```{toctree}
:maxdepth: 1

Debug </reference/applications/debug>
GPU Support </reference/applications/gpu-support>
Incus-Ceph </reference/applications/incus-ceph>
Incus-Linstor </reference/applications/incus-linstor>
OpenFGA </reference/applications/openfga>
```