Good online surveys websites in my mind

1. http://www.globaltestmarket.com/ (earned S$70 so far)
2. http://sg.aipsurveys.com/ (earned S$40 so far)
3. http://www.mymailmoment.com/mmmoment.Web/HomePage/content.aspx?page=login
4. www.OpinionWorld-Singapore.com
5. http://www.mysearchfunds.co.uk/apply001.asp?Friend=100705
6. to be updated.