The Cambridge University, located in England, needs no introduction. Ranked among the world's top three universities, it attracts brilliant students from the United Kingdom and all around the world. The domains of study vary from biology to technology and human sciences. There is no need to talk about the excellent quality of its courses, the sheer number of Nobel Prize laureates coming from Cambridge University prove it year after year.
The prestige of this university is now available for any non-native English-speaker, since one part of the university has specialized itself in teaching English to foreigners and creating exams to assess the level of English of foreigners. This department, called Cambridge ESOL (English for Speakers of Other Languages) offers certificates for all levels, from the Key English Test being for beginners, to the Certificate of Proficiency in English, for very advanced English-speakers. Some of the certificates offered by Cambridge University are domain-specific. The ILEC or the BULATS, for example, are made specifically for law and business purposes, respectively.
The IELTS certificate is also a famous language test created by Cambridge ESOL in association with the British Council and the australian IDP Education Pty.
English-in-England offers an overview of most certificates offered by the University of Cambridge.