Bilingual Dictionaries
Best Free Monolingual and Bilingual Dictionaries
Fluent in 3 Months Review
WordReference
Online Dictionary
Collins Online Dictionary
Dictionary, Thesaurus, and Grammar
Bab.la
Online dictionary for 28 languages
TravLang
Multilingual translating Dictionaries
Word 2 Word
A directory of multilingual language dictionaries and translators.
Picture Dictionaries
E Glossary
Learning Chocolate
Merriam-Webster -- Visual Dictionary
Oxford -- Pictures List
You might also want to try Google Images as a picture dictionary