Once upon a time the were: Metrotwit and Tweetdeck that provided the shortening of your Tweets.
What is the current best free Twitter client/application that has lots of features in it?
DOWNLOAD NATIVE TWITTER APP TO YOUR DEVICE.
Tweetdeck doesn't features the tweet shortening; I'm looking for a destop application for windows 7. Thnak you.
I think you're looking for the native Twitter App?
Twitter Helpcenter - Shortening urls in the native twitter app.
As in my question I'm interested in tweet shortening not in link one :) Thank you.