This is exactly why I was most excited about Extensions over every other announcement made at WWDC (yes, even Swift!). As I watched this video of the newly announced 1Password extension for iOS 8 it's obvious just how far Apple have knocked it out of the park with extensions. The only slight workflow issue is having to tap the 1Password button, then select the extension but as I understand it, there's no way around that. At least developers are able to filter the set of extensions listed, as shown in the video.
Oh and if you have an app which has any kind of login screen, please make my life easier and integrate this library!
While the "M" in the Xcode Project Navigator is handy, what would be really useful is to see what lines were modified compared to the current committed state. John Holdsworth has put together this useful Xcode plugin to do exactly that.