Europe, ESA, and a good amount of space actors have signed the zero debris charter that aims to increase the accuracy at which satellites are to deorbit when their activities have seized and to prevent space debris in a preventative approach.

ESA also has active plans to recover or extend space operations of satellites that needs servicing via its RISE-mission.

Finally, there are also the CAT and Clearspace-1 missions (amongst others?) which intend to actively remove satellites from orbit, or place them in the graveyard orbit.

Oh, and space lasers (for monitoring space debris).

I guess there are more, but I think this already shows it is actively being developed.