The International Phonetic Alphabet (IPA)

For further information check the following links:

• Wordreference Dictionary. Another dictionary (this time bilingual, so you can also see the translation into Spanish) where you can check pronunciation and meaning. Remember to click on the UK icon to hear the words.
• BBC Phonemic Chart. Use this chart to listen to the isolated sounds. All you need to do is to click on the symbol of the sound you want to hear.
• British Council Phonemic Chart.
• Sephonics. A free software to practise the International Phonetic Alphabet. Download the program and install it in your computer.
• BBC Pronunciation Tips. Here you will find a thorough explanations of the sounds of English. There are a lot of didactic videos and pronunciation exercises. 
• Phonemic Chart Keyboard. You can use this to type words using the IPA characters.
• Ted Power - English Phonology. A good site full of exercises devised to learn and master the International Phonetic Alphabet. 
• Fonetiks.org. A pronunciation guide to 9 varieties of the English language.