You could have downloaded SnipTweet 1.0 for Mac from our software library for free. The actual developer of this free Mac application is SnipTweet. The application is included in Communication Tools.
From the developer:
SnipTweet is a tiny web app that splits your longer-than-140-characters tweets into several ones. Your followers will read your text on their timeline exactly as you wrote it, only cut into as much tweets as necessary. This app uses Twitter's official "Sign in with Twitter" authentication.
You may want to check out more software for Mac, such as Tweeli, Opitter or Twittia, which might be related to SnipTweet.