tDash.org

tDash.org is a dashboard for Twitter, with focus on usability and accessibility.

It arranges the tweets you read into neat folders for easy sorting and viewing. The tweets you view are marked as read, so that they don't clutter up your inbox.

Login is via OAuth, which means no need to share your password with the application.

The interface is completely AJAX based for fast operation.

tDash also allows you to upload pics to Twitter.