The International English Language Testing System, or IELTS™, is an international standardized test of English language proficiency for non-native English language speakers.
Pearson Language Tests is a unit of the Pearson PLC group, dedicated to assessing and validating the English language usage of non-native English speakers.
The Canadian English Language Proficiency Index Program, or CELPIP is an English language assessment tool which measures listening, reading, writing, and speaking skills.