I stumbled upon the Post Apocalyptic Tumblr page and have really enjoyed browsing through the images there. There is a very wide range of pictures, from fashion shoots to cosplay, illustrations to photos of equipment used by real world military agencies. All of it is quite cool if you are looking for a little post-apocalypse inspiration. It has also been really cool to follow the image source links to a broad and interesting variety of web pages and articles!
I have put a link to the site in my blog roll, under “Funky Stuff”.