Twishort - Twishort is a best Twitter app for writing longer tweets. Tweet more than 140 characters
Democracy.io by EFF - A simpler way to send messages to Congress
Privatter - Privatter is the easy way to share long texts and pictures set limit on your followers. You can post them by Sign in with Twitter account to this site.
IssueVoter - The election is over, now keep tabs on your rep
5Tweets.com - Type a long tweet and 5Tweets will rewrite it into multiple tweets with a tweet count.
The Red Line - Call Republican senators in russian so they'll listen to you