Being independent of the desktop type has its drawbacks: Recoll desktop integration is minimal. However there are a few tools available:
Users of recent Ubuntu-derived distributions, or any other Gnome desktop systems (e.g. Fedora) can install the Recoll GSSP (Gnome Shell Search Provider).
The KDE KIO Slave was described in a previous section. It can provide search results inside Dolphin.
If you use an oldish version of Ubuntu Linux, you may find the Ubuntu Unity Lens module useful.
There is also an independently developed Krunner plugin.
Here follow a few other things that may help.