'Lightroom' app (Photoshop): is there an equivalent for LL

[m654321]

I know someone whose on the verge of switching from Windows 10 to LL. 
He's a keen photographer, using Photoshop Lightroom (a.k.a. Lightroom) to routinely modify the raw file parameters of his photos (e.g. colour balance, exposure, etc). Raw is the name of the file format

His concern is that if he switches to LL, there wont be software available, like Lightroom, that will enable him to manipulate the raw file parameters. 

Is there a good equivalent of Lightroom that he could use in LL?

[Valtam]

People, PLEASE PLEASE PLEASE, if you're not wanting help with specific software, PLEASE post in the correct section. Mods and I are getting tired of this. Future posts will simply be deleted, so if you've written a large post, to bad. We've all been here long enough to get this right

Moved to On Topic.

[Valtam]

Does this apply - https://www.darktable.org/ ?