TOEFL

TOEFL is a widely-used test given in many locations around the world to help determine the level of English proficiency for a student.

From the ETS TOEFL site:

More than 9,000 colleges, agencies and other institutions in over 130 countries accept TOEFL scores. For more information, including using your scores to satisfy visa requirements in Australia and the U.K., how to find institutions that accept TOEFL scores, and more, see Who Accepts TOEFL Scores.

Costs:

Registration fees vary by country and timing of registration. For more information, please look here.