[Opm] about opm

[lc]

Dear developers and users,

I recently discovered dumux and opm.

To me it is not clear what is the difference between these two codes, 
which relation among them?

Which is the most updated and maintained?


My task is to simulate viscous fingers due to water/oil interaction with 
Buckley-Leverett (2d at least) equations including capillarity effect 
with possibly injection/extraction. Is there any tutorial/example about 
this?

Which code should I use? Where to find the clearest installation/usage 
instructions for ubuntu (from source)


Kind regards,

Lorenzo Campoli