Keyboards
Russian homophonic keyboard for Windows 10, Windows 8, Windows 7 & Windows Vista.
Russian homophonic keyboard for Windows XP/NT.
Russian homophonic keyboards for GNU/Linux, including KDE
Russian homophonic keyboard for OS X
For Android cell phones I like the AnySoftKeyboard with the Russian language pack, which has a good homophonic option. One caveat: do read the warnings about the program when you download.
Other Russian keyboards and fonts that will allow Mac users to type in Russian under OS X. If you learned to type in the US, I advise choosing one of the homophonic/phonetic keyboards. An alternative source of information is here.
Web-based homophonic keyboard that you can use to type Russian when you're at a computer that doesn't have a Russian keyboard.
Another web-based homophonic keyboard courtesy of Paul Gorodyansky
Fast and dirty Cyrillic access when you are away from a computer with a Russian keyboard
Travel in Russia, communications
Reasonably priced student education tours in Russia. (Warning: the background image on the website is so busy it makes an unpleasant impression, but this really IS a great opportunity.)
How to maximize your study abroad experience, resources.
List of reasonably priced phone cards for calling Russia.
Literary works for free
Russian e-books: www.lib.ru, fictionbook.ru, www.ladoshki.ua
Full-text searches on various editions of Pushkin's works and letters, along with many
volumes of Pushkin scholarship and pushkiniana here
Suggested reading
Russian icons and Orthodox worship
The Meaning of Icons (Leonid Ouspensky, Valdimir Lossky); Timothy Ware's books (good basic intros to Orthodox worship for Westerners); Icons and Saints of the Orthodox Church (Alfredo Tradigo; very detailed analyses of icons); Praying with Icons (Jim Forest; more devotional than academic, but a good introduction). These are suggestions from Michele A. Berdy on SEELANGS Sat, 23 May 2009.
News sources
Impartial
Новая газета (www.novayagazeta.ru)
Эхо Москвы (www.echo.msk.ru)
newsru.com
BBC Russian language service
Under the thumb of the Russian government
Правда (pravda.ru)
Известия (izvestiya.ru)
Unevaluated
Google news in Russian
Russian TV
Watch Russian TV on your computer
Russian image sources
Wonderful discussion of sources of Russian photos and images
Many Stalin images
Collations of Russian links
Elina Yuffa's excellent collection kindly hosted by the Russian and Slavic Department of Hunter Collge
http://home.freeuk.com/russica2/link.html
Collection of links that I have yet to explore
Jim Becker's links that I have yet to explore
On-line dictionaries
Quick and dirty look-up
WordReference.com | ABBYY Lingvo | Wiktionary
Russian Wiktionary
Lingro.com has an on-screen translation tool that lets you look at a Russian website, click on words, and have the target words pop up in translation. You can read a review on Edie Furniss's blog.
In depth
Many standard online Russian→Russian dictionaries, including Ожегов, Даль, Ушаков, and some encyclopedias
Large collection of Russian→Russian dictionaries, including thieves' language
Huge collection of Russian→Russian dictionaries, including some technical ones
Russian morphological dictionary online, containing the data from Zaliznyak's Грамматический словарь русского языка and vastly supplemented.
Multiple free language glossaries including Russian↔English
Illustrated dictionary of Russian idioms
Style guides
Gramota.ru is my favorite quick and dirty site for questions on Russian stylistics. It also provides access to a series of standard dictionaries.
Rozental's Russian language handbook («Справочник по правописанию, произношению, литературному редактированию» by Розенталь Д.Э., Джанджакова Е.В., Кабанова Н.П. Издание второе, исправленное. М.: ЧеРо, 1999.)
Graduate programs
Russian language/literature and Slavic linguistics graduate programs at various universities
Russian handwriting practice and review
Russian alphabet quick reference
Wonderful animations showing how to draw Russian letters
Russian cursive letter by letter, with practice sheets (pdf):
Russian alphabet for self study with English explanations (tiff)
Study references
Spelling rules
Don's Russian grammar notes
US States and capitals in Russian
Map of Moscow
Map showing the distribution of Slavic languages
Free on-line web-based exercise that cover the 2000 most commonly used Russian words
Enormous free flashcard site that lets you study Russian, other foreign languages, and other subjects. I've noticed that there are occasional errors and formatting peculiarities that vary from vocabulary set to vocabulary set.
Russian Wikipedia
The history of Cyrillic character encodings
Online interactive Russian reference grammar
Beginning Russian grammar notes at Cornell. You'll have to download one of the Cornell fonts, though, for the accents to display correctly. You'll find the reference at the bottom of the first page on the website.