iOS: Sharing links and images on iOS got a lot easier in iOS 8, but it still doesn't offer you much control. Linky is a small little app that does just that.
With Linky, you can connect and share links directly to Twitter, Facebook (both profiles and pages) and App.net. More importantly though, you get a lot more control over sharing to multiple accounts, adding images, selecting text, sharing to specific friends on Facebook and more. If you do a lot of sharing directly from iOS, it's much better than the default share options.
Linky ($4.99) [iTunes App Store]