Joy of joys! the Park CT6 chain tool is back, updated to version 6.2. Park stopped making it for a while because of the cost of stainless steel, but now you can once again own one for the princely sum of £20 (a bit less if you shop around). And I'd suggest that you seek one out, because it's a gem.
Cleaning a dirty bike is never much fun, so anything that makes it easier is to be welcomed. This four piece brush set from Park Tools gives you a comprehensive armoury for dealing with caked on mud, grubby rims and cassettes that look as if they’ve been dipped in Marmite.