Windroplr

Windroplr includes a built-in screenshot utility that saves you the trouble of using PrtScrn or Snipping Tool. Just hit the shortcut key and select the area of interest that zone will be immediately converted to an image and uploaded. Droplr uses Twitter accounts instead of requiring you to create yet another account. Neither Droplr or windroplr store your password or posts updates on your behalf. windroplr has read-only access to your account - you can confirm this by accessing the Connections tab on your profile. Keep in sync with your mac and iPhone, upload images, videos, text, and links. Auto-archive multiple dragged files. Grab and upload screenshots. Uses Twitter XAuth authentication.

Requirements:

Microsoft .NET Framework 4.0