TOEFL (Test of English as a Foreign Language) assesses English proficiency for non-native speakers.
IELTS (International English Language Testing System) is an English proficiency test
SAT (Scholastic Assessment Test) assesses mathematical and evidence-based reading and writing skills.
GRE (Graduate Record Examination) assesses verbal reasoning, quantitative reasoning, and analytical writing.
GMAT (Graduate Management Admission Test) is specifically designed for admission to MBA programs.