please see the following link for various coaching centers:
IELTS is International English Language Testing System and TOEFL is Test of English as a Foreign Language. IELTSand TOEFL are conducted twice a month at least in all the major cities in India. Countries like UK, Australia, Nz, USA Canda, Singapore, Ireland require IELTS/TOEFL exam. One needs to write either of these exams when they want to migrate or go for studies to a foreign country. PLAB(Professional and Linguistic Assesment Board Test) exam is for medical practisioners who wish to either study further or practise in the UK. There are 2 parts and the first part can be written in India, the 2nd part can be written only in the UK.