MDBG English to Chinese dictionary - English to Chinese dictionary with Mandarin pinyin - learn Chinese faster with MDBG!
wenlin - Wenlin Software for Learning Chinese
YellowBridge - Free online dictionary with suggestions of words that start / end with searched character.
Pleco - The #1 Chinese dictionary app for iOS and Android
ChineseSkill - Chinese language has and does deserve its notoriety for heartbreaking difficulty.
Syng - Syng is a free, open source, cross platform, Chinese to English dictionary app and study toolset.