Not right now, but this feature is on backlogs.
Technically speaking it can be done fairly easy, but...
I'm planning a free media repository too (backgrounds, sprites, items collection), and it depends if the artists of the repo's image grant the license for the used arts to be downloaded together with the games created. (Ofc, this applies only if you use images from the repo in your game).
Right now, I'm in talk with some of them, like @Rachel Chan, to clarify this questions.