CAE (http://www.cambridgeenglish.org/exams/advanced/)
The examination of Cambridge English Language Assessment called Cambridge English: Advanced, also known as the Certificate in Advanced English.
CPE (http://www.cambridgeenglish.org/exams/proficiency/)
The examination of Cambridge English Language Assessment called Cambridge English: Proficiency, also known as the Certificate of Proficiency in English.
FCE or FCE for Schools (http://www.cambridgeenglish.org/exams/first/)
The examination of Cambridge English Language Assessment called Cambridge English: First, also known as the First Certificate in English.
IESOL (http://www.cityandguildsenglish.com/)
Internal English for Speakers of Other Languages qualifications by City & Guilds.
IELTS (http://www.ielts.org )
The International English Language Testing System, jointly owned by the British Council, IDP Education Australia, and Cambridge English Language Assessment.
LanguageCert (www.languagecert.org)
A set of English Language qualifications owned by PeopleCert Qualifications Limited, member of the PeopleCert Group.
LRWS
Listening, reading, writing and speaking.
NZCEL
The New Zealand Certificates in English Language listed on the NZQF (NZQA being the qualification developer).
OET (https://www.occupationalenglishtest.org/)
The Occupational English Test of Cambridge Boxhill Language Assessment.
PToE (http://www.pearsonpte.com/Pages/Home.aspx)
The Pearson Test of English (Academic).
TOEFL (http://www.ets.org/toefl)
The Test of English as a Foreign Language of the Educational Testing Service, whose headquarters are in Princeton, United States.
TWE
In relation to TOEFL is the Test of Written English.