Морфологический словарь русского языка: Shows inflection (declension or conjugation) of Russian words.
Choose Russian + Lemmatiser (and I recommend choose sort alphabetically or by frequency) to see all the words in your Russian text listed as lemma (dictionary forms), which may be useful in creating flashcards, etc.
Collection of Russian Corpora
University of Leeds online Russian corpora with concordance and collocations search parameters.
Learn to touch-type in Russian with free online exercises. Go to Practice > Settings > Keyboard Layout and choose Russian.
$ – Really cool corpus tool! You can search various corpara (including your own) using complicated queries to see frequencies, collocations, and other language behavior.
($) Tools for converting Russian text to phonemic transcription (IPA or Cyrillic), adding stress marks, and word frequencies.
($) – Toodledo is a great tool for keeping your studies (and work) organized. You can create a calendar with tasks, and also organize notes, outlines, lists, and track goals. If you’re learning a language independently, it’s important to have a disciplined system of study, and I highly recommend Toodledo to help you do this.
Russian search engine (think Google) with a translator tool, live TV streams (under video), etc.