Glosbe - Huge collaborative massively multilingual dictionary.
Pleco - The #1 Chinese dictionary app for iOS and Android
VerbAce - VerbAce-Pro is an easy-to-use Desktop Translation Software. Translate in a mouse click
wenlin - Wenlin Software for Learning Chinese
Wordnik - the biggest online English dictionary, by number of words
Youdao Dictionary - Youdao is a search engine released by Chinese internet leviathan, NetEase in 2007.