FeedDemon is a popular RSS reader for Windows. Posts you read in FeedDemon can be directly added to Pocket. Just click on the RSS icon in the post and choose Read It Later, which is just the old name of Pocket. You can also press the key S and it pops up this menu. When a post is successfully added to Pocket, you will see Article has been shared (200) at the bottom of FeedDemon.
The first time you do this, you will be asked for your Pocket username and password. Be very careful at this step. You have to give the correct username and password. If you give a wrong one or choose Cancel, FeedDemon's Pocket integration will not work right from next time. If this happens to you, your only resort is to uninstall FeedDemon, delete all the files it created and reinstall FeedDemon.
Tried with: FeedDemon 4.1 and Windows 8 x64