TweetTwain  is a desktop client from Texient Software that supports Twitter. It’s a Java based client which means it can be run on Windows, Mac as well as Linux.Schedule updates from all your multiple twitter accounts.Follow or unfollow your twitter friends,monitor your brand etc..

Features of TweetTwain:

     * Shorten URL
    * Unlimited follow,unfollow twitter users
    *Search and follow by keywords
    * OAuth authentication to protect your twitter account
    *Search, track trends,brands easily and autofollow
    *Windows, Mac as well as Linux supported
    * Unlimited accounts
    *Image uploading to Yfrog
    *Schedule your Tweets and tweet automatically
    *Post RSS feeds to Twitter

TweetTwain comes in two version,the Lite version (version 1.3) with limited functionality:limited to one twitter account,can schedule only ten tweets,one feed URL and no image uploading to yfrog.And the PRO version with full functionality of TweetTwain.

Download TweetTwain Lite from these locations:

For Windows: Download it here.
For Linux: Download it here.
For Mac: Download it here.

If you want to experience the full functionality of TweetTwain,consider buying the PRO version here: 

Installation requirement:
TweetTwain requires Java 6 or later,get Java here.