Cambridge Exams:
KET: key english test.
PET: preliminary english test.
FCE: first certificate in english.
CAE: certificate in advanced english.
CPE: certificate of proficiency in english.
Trinity Exams:
Spoken english exams.
IELTS:International English language testing service
University entrance exam. Also used for immigration and other purposes.
TOEFL:Test of English as a foreign language
University entrance exam by Educational Testing Service.
TOEIC:Test of English for international communication
Originally designed for the Japanese government by ETS.