Complex sentence: Due to the social aspects, LibraryThing is a Web 2.0 application and has been compared to bookmark manager Del.icio.us, the collaborative music service Last.fm, and aNobii, another book cataloguing site.
Split into simpler sentences: Due to the social aspects, LibraryThing is a Web 2.0 application. It has been compared to bookmark manager Del.icio.us, the collaborative music service Last.fm, and aNobii, another book cataloguing site.