DIY cat furniture, IKEA hack: TRENDIG 2013 tray table with cushions made from GURLI throw. Huge sisal mouse from Zooplus. Edit: GURLI is not cat-proof, so make cushions from stronger material :) Archie will have in new house!
These cat window shelves are Ikea hacks, just regular shelves with a nice soft bed on top. Would be a good idea to put Velcro between the bed and the shelf to help keep it in place. And never mind the link, it doesn't lead anywhere of relevance.