Twitter co-founder Ev Williams wants developers to come back:

Williams also suggested that it was time for Twitter to look for new ways to connect with software developers and to take another stab at making Twitter a platform. Twitter  famously went to war with developers several years ago when it restricted developers’ access to the API that allowed developers to grab Twitter data for their own use.

This is a very good thing if it actually comes to pass.  While I like what Twitter has been doing lately with their native iOS app, their Mac and iPad apps are horribly out of date.  I’m a Tweetbot user on the Mac and waffle between Tweetbot and Twitterrific on iOS, but would love to see even more innovation in the Twitter app space.  Right now, developers’ hands are tied.