Belgium (even though Belgium has been without an operating government for months now), Canada, Denmark, France, Italy (the main user of Libyan oil), Spain, Sweden, United Kingdom, United States, and Norway have announced their direct military action against Libya (in the form of actual attacks, or providing military support).

Arab League member Qatar said they will take part in military action.  That is now in question since the Arab League now says they were basically tricked into supporting the UNSCR 1973 against Libya.