You can use the following dictionaries and online translating systems:

•  Dic.academic.ru
http://dic.academic.ru/
Dahl, Ushakov and Ozhegov's explanatory dictionaries; Brockhaus and Efron's Encyclopedic Dictionary; Large Encyclopedic Dictionary, and other reference books. Interface: Russian

•  Russkie slovari
http://www.slovari.ru/
http://slovari.don.sitek.net/
Ozhegov and Shvedova's dictionary; New Dictionary of Loan Words; Russian Semantic Dictionary; The Dictionary of Pushkin's Language, and other dictionaries. Interface: Russian

•  Грамота.Ру
www.gramota.ru/
Russian Spelling Dictionary; Dictionaries of Russian Word Accent (common and proper names); Dictionary of Pronunciation, and other dictionaries Interface: Russian

•  Abbyy Lingvo Online
http://www.lingvo.ru/lingvo/common/index.asp
Russian-English and English-Russian dictionaries Lingvo. Interface: Russian

•  Rambler: Dictionaries
http://www.rambler.ru/dict/
New Large English-Russian Dictionary, Smirnitskii's Russian-English Dictionary, Lein's German-Russian Dictionary, Zwilling's Russian-German Dictionary. Interface: Russian

•  Perevodov.Net
http://www.perevodov.net/
PROMT Translating System: English-Russian and Russian-English.Interface: Russian

•  Rustran.com
http://rustran.com/
Socrates: English-Russian and Russian-English Translating System. Interface: English