http://www.shemes.com/index.php?p=download
http://www.quickpar.org.uk/
http://nzbmatrix.com/
http://www.astraweb.com/
2nd one isn't really needed, but its nice if you have to repair a file. 1st link is the DL client. 3rd link gets you the NZB files you need, and the final link is the service that you have to have to dl the files from the NZB's