Kamus Dewan online: http://sbmb.dbp.gov.my/knb/cariankata/dbp_ka_rujukan_kamus_dbp.aspx

English Dictionary: http://dictionary.reference.com/

What u want to learn or revise mostly inside: http://www.bbc.co.uk/schools/gcsebitesize/

Help for labs 'Qualitative Analysis': http://www.crescent.edu.sg/crezlab/Welcome.htm

Learn Arab: http://www.dalilusa.com/Arabic_Course/default.asp

Thats for now.. If I found more of it I will share...