libbluray
is the library you'll need installed to play back Blu-rays. You'll need libaacs as well to bypass the DRM.
The software ships with a couple of programs that are helpful as well. Some of them are:
bd_splice
which you can use to copy pieces of titles / playlists (see also bluray_copy for same functionality)bd_list_titles
to display title informationbd_info
to display information about the Blu-ray