nautilus-gksu - privilege granting extension for nautilus using gksu
nautilus-sendto - integrates Evolution and Pidgin into the Nautilus file manager
nautilus-share - Nautilus extension to share folder using Samba
nautilus-actions - nautilus extension to configure programs to launch
nautilus-bzr - Bazaar (bzr) integration for nautilus
nautilus-cd-burner - CD Burning front-end for Nautilus
nautilus-clamscan - Antivirus scanning for Nautilus
nautilus-filename-repairer - Nautilus extension for filename encoding repair
nautilus-image-converter - nautilus extension to mass resize or rotate images
nautilus-open-terminal - nautilus plugin for opening terminals in arbitrary local paths
nautilus-pastebin - Nautilus extension to send files to a pastebin
nautilus-script-audio-convert - A nautilus audio converter script
nautilus-script-collection-svn - Nautilus subversion management scripts
nautilus-script-debug - Simple nautilus debugging script
nautilus-script-manager - A simple management tool for nautilus scripts
nautilus-scripts-manager - simple tool for nautilus scripts management
nautilus-wallpaper - Nautilus extension. Add a "set as wallpaper" entry in context menu
nautilus - file manager and graphical shell for GNOME
nautilus-data - data files for nautilus
nautilus-dbg - file manager and graphical shell for GNOME - debugging version
nautilus-sendto-empathy - GNOME multi-protocol chat and call client (nautilus-sendto plugin)
 

I think all of these should be fully integrated by default but they aren't.