Quitter is a free to use and opensource, simple twitter client which does not have any flashy interface, rather it runs from a small command window in DOS mode in windows. It is completely portable twitter client which does not require any installation as it runs from a single executable which is 105 kb in size, so it can easily fit into any pen drive you have.

Some key features if this small and simple twitter client are , see some more screenshots of the application here

• you can read, post, reply and retweet to any message from command line.
• you can organize the people you follow into groups and read tweets by group of people.
• you can highlight tweets from specific users or that contain some specific  #hashtags 
• you can use URL shortening services like TinyUrl.com 
• you can open the links in your default browser with mouse click or copy paste needed
• you can send and receive direct messages to other people who follow you
• you can follow or unfollow any one at twitter

Requirements To Run Quitter – It runs properly on Windows 2000/XP/Vista but requires Microsoft .NET Framework 2.0 or higher

Download Quitter