Tweetbot from Tapbots might be the first app to make it easier to share your most recent photos on Twitter.
In addition to the typical “take a new photo or video” and “choose from existing media” options that most apps have, Tweetbot 1.8 now sports a “use last photo taken” feature. Instead of all the tedious taps required to dig into your Camera Roll, this new option lets you add your most recent photo to a tweet with a single tap.