Recently Posterous joined Twitpic for sharing images on Twitter. Posterous is a simple place to post anything including images, videos, mp3 and files by sending an email to post@posterous.com in reply you can see your post at http://yourname.posterous.com.Posterous new API let users to post your image to some of the most popular Twitter clients either from desktop or from your iPhone.
Yahoo! Zimbra Desktop - It's an offline capable client so you can take your data with you whenever you don't have internet access powerd with Ajax technology. Working offline is major feature integrated with Zimbra soon after Google adding offline access through open source gear projects. You can access Zimbra Mail. Yahoo! Mail. Gmail. AOL in one common place. Even Outlook and other business e-mail account can be accessed using POP or IMAP.