My iOS Twitter client of choice, Twitterrific from the Iconfactory, just updated to version 5.8.
The new release requires iOS 8 and supports system-wide sharing extensions, iOS 8 share sheets, an improved user suggestion bar, and setting the default browser to Safari, Chrome, or Twitterrific itself. Unfortunately, it also eliminates a feature I used a lot—the ability to tap and hold on a link to see the full URL, which is surprisingly helpful in deciding whether or not to follow a link.
(Every time I mention that I use Twitterrific on iOS I am inundated with people asking me if I’m aware of Tapbots’ excellent Tweetbot. Of course I am. I own Tweetbot on the Mac and on iOS. But Twitterrific works better with the way I use Twitter on my iPhone and iPad.)