Binary Boy - description from Softdepia.com:
Binary Boy is a yEnc and NZB compliant full-featured newsreader that renders you a great assistance in downloading newsgroups. Binary Boy quickly searches through thousands of newsgroup articles for pictures, sounds, and other file attachments matching your search criteria. You can fix custom search rules, folders and settings to each newsgroup, preview damaged or incomplete files, and download whole .rar sets with two clicks.
Binary Boy features a history file for reducing unwanted downloads, the ability to change the main download folder and assign a folder for each newsgroup, Windows NT and LAN compatibility, improved MIME support, better handling of MP3 filenames, a more colourful toolbar, and compatibility with Windows 98.
A few Usenet search sites have been developed recently that return search results as NZB files. Binary Boy is fully NZB compatible. From the Binary Boy queue, you can load an NZB file directly and download the referenced files just as if you had performed a search within the newsreader.
Binary Boy is a "Free to try" program. You can download and try it for an evaluation period.