The Tumblr app lets you bring your blogging to a mobile platform. On Tumblr, users can share photos, videos and text, so you can create a page dedicated to your cat's antics or a page with inspirational quotes, sort of like a mini blog. The free app lets you manage multiple blogs and view and reply to messages. Plus, its offline support lets you post, like, reply and reblog even when you're away from a connection. Both Android and iOS versions of the app recently got updates; the Android redesign rolled out a new interface and the iOS version touts a brand-new camera.