- http://www.bbc.co.uk/learning/subjects/english.shtml
- http://www.cambridgeenglish.org/learning-english/free-resources
- http://learnenglish.britishcouncil.org/en/
- Oxford dictionary of English https://www.oxforddictionaries.com/
- TOEFL test https://www.ets.org/toefl/
- GRE https://www.ets.org/gre
- GMAT http://www.mba.com/global
- Includes encyclopedia information as well https://www.thefreedictionary.com/
- For British English https://dictionary.cambridge.org/
- For American English https://www.merriam-webster.com/