This indexer has the knowledge of the filenames inside the RAR archives. Not only you can see what files are inside the archive but the search itself is done on these filenames. This is pretty powerful when the title of the post is cryptic but the file are correctly named inside the archive.
Plus you can filter by content type and size if there are too many results.
It's free, has the same retention as giganews and has plenty of features.
http://www.mysterbin.com/
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