DIY cat trees. Let's pretend I'm going to make one of these someday for Bea Arthur.
Cat Climbing Tree (Mille Makes), with link to construction pictures
LitterBoxFurniture *repurpose furniture for this*
A DIY Pet Station. This was found at http://www.addicted2decorating.com. Thanks for the great find!!
INSPIRATION :: Cat Litter Cabinet :: How cool is this custom built cabinet?! Has a built in cat door (by Pet Safe) w/ a magnetized flap along w/ a vent in the back for fresh air. Painted gray w/ black knobs & hinges.
For the pets
dog proof cat litter box furniture - Google Search
Cat Condo from Destroyed Dresser! Re-purrrr-posed feline heaven. :: Hometalk
29 adorable repurposed furniture ideas for pets!