The following resources may be helpful:
FastWeb (free financial aid database that has good coverage of the awards available for international students)
International Education Financial Aid (IEFA) (free searchable database of scholarships and awards for international students)
Edupass, FinAid's website specifically for international students.
There may be financial aid available from your own government. (Usually this support requires that you return home after your education is complete.) Contact the cultural section of your embassy or your ministry of education for more information, since there are many awards that require you to be nominated by your government.
There may also be aid available from the US government for students from specific countries. To find out if there is any financial aid from the US for students from your country, contact your embassy. See http://dir.yahoo.com/Government/Embassies_and_Consulates