Online useful English tools/sites

My favourite tools / sites:

1. howjsay.com
-It's a free online Talking Dictionary of English Pronunciation with Instant Sound
-How does it work?
#Enter the word you want and click Submit
#When it appears in pink, mouse over it to hear it spoken as often as you want

2. Dictionary.com
-It's a free online Dictionary with meaning provided
-How does it work?
#Enter the word you want and click Search
Then, the meaning of the word will appear. You can click on the 'speaker' icon to listen to its pronunciation.
The special thing of this site is its 'Word of the Day'. You can learn a word per day.