1)   News File Grabber 4.6.0.1
A specialized newsreader which lets you easily download all kinds of binary files from the newsgroups on the USENET. MIME, UUE, base64, yENC (multi-parts with auto-combining), XPAT-search, NZB-files, SSL-connections, RAR-files, Posting and much more.

 2)   Newsgroup XPAT Search (nzbcreate) 1.1
Perform a pattern (XPAT) search on a news server. This has the advantage of being much faster than downloading all of the headers from the server because you only DL the headers you want. You can then create an NZB file from the results.

 3)   NZB Editor 1.0
Nzbedit is a free GUI editor designed to let you edit the contents of an NZB file. You can change the fields of the NZB including the subject an author fields. You can do searches and replaces, delete parts or segments, etc.

 4)   NZB Dump Utility (nzbdump) 1.0
nzbdump is a free tool that displays the contents of an NZB file. Nzbdump is not a newsreader or downloader, and cannot download files for you. It's main a diagnostic tool that you might be able to use if you're having trouble with an NZB file.

 5)   NZB File Validator 1.0
Nzbval is a free utility that you can use you test an NZB file against your news server and verify that all of the parts exist before you start downloading. It can save you a lot of time because you can avoid downloading from bad .NZB files.