PockeTwit is a twitter client for the Windows Mobile Standard Smartphones. You can refer to official Twitter app if you need a client for Android.

Features:
* A unique user interface
* Works on VGA, QVGA and SmartPhone devices
* Support for multiple twitter and identi.ca accounts
* User groups to help manage your friends updates
* "Conversation View" shows a what this status was in reply to.
* Uses standard notifications to alert you of new friends statuses or replies
* Keeps an addressbook to easily add usernames to posts.
* URL shortening with is.gd
* Integration with shorttext.com for tweets longer than 140 characters
* Take photos and send to TwitPic, mobypicture,pikchur, twitgoo, or yfrog
* Preview images from those services without a browser.
* Integrated search.twitter.com
* Quote (re-tweet) or email a status
* Clickable @names, URLs, and #Hashtags
* Option to check for new version on startup
* Themes