Lexin is an online Swedish and Norwegian lexicon that can translate between Swedish or Norwegian and a number of other languages. Its original use was to help immigrants translate between their native languages and Swedish, but at least the English-Swedish-English lexicons are so complete that many Swedes use them for everyday use.
Swedish
The Swedish lexicons are now called Folkets lexikon (The People's Dictionary) and support bidirectional translation between Swedish and:
References
Lexin Wikipedia(Text) CC BY-SA