SnagIt is one of the most popular screen capture tools available today, we have been using SnagIt for quite some time now to create the images for the blog and other uses. SnagIt in itself is a very feature rich tool, providing you with various options to capture images or record screen activities.
In addition to the built-in features SnagIt also provides accessories called as Outputs which allow you to send the capture directly to another service. By default SnagIt allows you to send the captures by email, upload it to a FTP site or to office products such as Word, Excel or Powerpoint.
With the help of Output accessories you can send the output directly to various popular blogging platforms such as WordPress, TypePad, Movable Type, LiveJournal in addition to allowing you to send images directly to messengers such as AIM Skype.
They also have a option to upload the images directly to your Flickr account, for a complete list of supported outputs visit the SnagIt outputs accessories page.