Pneumatic is a NZB engine add-on for XBMC Eden. It uses SABnzbd as backbone.
Pneumatic has a set of API's for other add-on's to use.
plugin://plugin.program.pneumatic/
?mode=play&nzb=[url.encoded.nzb.http.path]&nzbname=[url.encoded.output.name]
?mode=download&nzb=[url.encoded.nzb.http.path]&nzbname=[url.encoded.output.name]
?mode=incomplete
?mode=save_strm&nzb=[url.encoded.nzb.http.path]&nzbname=[url.encoded.output.name]
?mode=strm&nzb=[url.encoded.nzb.http.path]&nzbname=[url.encoded.output.name]