All the junk that floats in space above planets like Coruscant, old satellites, garbage, destroyed starfighters, metals, etc. Do they clean that stuff up with special craft? I checked Wookieepedia and I came up with nothing.
Star-Wars has shield technology. There is no need to clean up space junk. Shield = no risk of damage from impact of junk in orbit.
Eventually it all comes down and burns up (or crashes), so gravity cleans up orbital junk.
There are several questions on Space about problems we have. For the most part these are not issues in the Star Wars universe.
There are two races who specialize in garbage collection, according to published sources.
The bad garbage guys are the Ugors, soupy, space-armored religious fanatics who are the SW equivalent of hoarders. They have an entire stellar system which they run as a junkyard/religious shrine. Customers can pay to "make a pilgrimage" and search through the debris for their desires.
The good guys are the schnauser-like, super-recycling Squibs, whose wheeler-dealing culture has been featured in several works. They love to make complicated bargains which wind up making everyone feel like they got away with a great deal.
These two races appeared first in "Scavenger Hunt: An Adventure for Star Wars the Roleplaying Game" by Brad Freeman, published by West End Games (1989). Squibs have appeared subsequently in several works, usually as comic relief.
See also http://starwars.wikia.com/wiki/Squib for a complete bibliography.