Dictionaries:
- Oxford Learner’s Dictionary
- Oxford Advanced Dictionary
- Oxford Online Collocations Dictionary
- Wordreference Dictionary
- Diccionario PONS
Pronunciation:
- Interactive Phonemic Chart (British Council)
- Acapela Box (online text-to-speech machine)
- Phonetic Transcription
- English Vowel Sounds – Pronunciation Training
- Improve your English Pronunciation!
Grammar:
Writing:
- Online writing automatic correction: write your text and check if your spelling, grammar or style are correct.