http://www.kamus.com/
Malay-English-Malay:
http://www.kamus.com/may-eng/
http://www.kamus.com/eng-may/school
It offers NOT ONLY Malay-English-Malay, but other languages too. At the moment it's in Beta Testing but it works... so far. Below are the languages I've tried.
Portuguese:
http://www.kamus.com/por-eng/
http://www.kamus.com/eng-por/
Latin:
http://www.kamus.com/lat-eng/
http://www.kamus.com/eng-lat/
.