Twitter and Facebook have been built into the iPhone and iPad for a while, but thanks to sharing extensions in iOS 8, you can now quickly and easily send your photos, videos, comments, and other content to any social network or online service you use, from any app you happen to be using. All you have to do is install the share extension, tap the share button, and choose the extension you want to use. Best of all, share extensions have already been implemented by a bunch of great apps. Here are some of our favorites!
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