Aqaba Special Economic Zone Authority (ASEZA)  -  The Aqaba Special Economic Zone is emerging as a major economic development node for tourism, recreational services, professional services, multi-modal transport, and value-added industries in the Middle East.
http://www.aqabazone.com/

Embassy of the Hashemite Kingdom of Jordan in Washington D.C. -  Investment Opportunities as detailed by the Embassy of the Hashemite Kingdom of Jordan in Washington D.C.
http://www.jordanembassyus.org/new/commercial/opportunities.shtml

Jordan Investment Board * -  Since its creation by the government of Jordan in 1995, the Jordan Investment Board  (JIB) has been dedicated to encouraging and facilitating investment in Jordan.
http://www.jordaninvestment.com/
*,  highly recommended by JordanHomeFinder.com

Jordan Export Development & Commercial Centers Corporation -  Jordan's official trade development and promotion organization. Founded in 1972, JEDCO's activities cover trade development and promotion, trade fairs, trade necessary information services, and human resource development. 
http://www.jedco.gov.jo/