A really cool app that is gaining popularity very quickly is pinterest. I love using this app to create mood boards for inspiration. It is basically an app and website where people can find photos of basically anything. All you have to write are a couple of keywords of what you are looking for and the app gives you all the photos with that hashtag.
A lot of the photos are really dope shots of what ever category you are looking up. This app is like the new tumblr.
You can save as much moldboards as you want which is awesome.