I’ve just found this tool for moderate comment on your Wordpress blog right from your desktop. You can easily approve, delete, or mark comment as spam.

Moderator is a WordPress Plugin and associated desktop application, built using Adobe AIR, that allows you to view and moderate comments from your desktop. Some of the features of this early release of the application include:

• Viewing unmoderated comments.
• Dock and system tray notifications of the number of unmoderated comments.
• Accept, delete, and spam comments from within the desktop client.
• Close application window, or minimize it to the system tray while running.
• Shows the Gravatar icons for the user who posted the comment.
• This is an early release of the application. As such, there are probably bugs and other issues that you may run into.
• Also, this is by no means feature complete (see ‘Roadmap’ below).

The tool was built using Adobe Air that mean you can run this tool on Windows, Mac and Linux and this tool is available for free download.

Link : More Info & Download