Debated about making a separate thread for this, but I suppose the original query involved Russian "stuff" so that could be anything.
Scenery.....
Keep in mind that many of these airports will likely be pretty sparse or even empty unless you have Russian AI traffic installed.
This list is not all inclusive. Just a selection of what I enjoy, and is all freeware:
Pulkovo Airport ULLI (St. Petersburg, Russia)
http://ulll.avsim.su/This airport is in northwestern Russia, and provides easy access to Scandinavia and the Baltic states. When you go to the website, you'll see the word "Download" in English on the left. Then, in the first entry on that new page, hit "Download" again in the new link location. After you download the zip file, put the ULLL and ULLL.LC folders (located in the FS9 subfolder) into your FSX/Addon Scenery folder. Then, copy over the files from the addon's FSX subfolder into the ULLL folder that you just placed within FSX/Addon Scenery to apply the FSX changes. Then, go into FSX and activate both folder. ULLL being higher on the scenery listing than LC. It's a very detailed airport with an interesting layout that combines old and new. You'll see the newer terminal in the center of the airport with the satellite terminals a short distance away (just like in the picture on Wikipedia). The southwest quadrant of the airport grounds has the old (still active) part of the airport featuring more Soviet-style architecture. It's a big airport in a nice location, and one of my favorites in FSX!
Rostov-On-Don URRR (Rostov-On Don, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=42342This airport is in southwestern Russia on the Sea of Azov, which is directly north of the Black Sea. It provides easy access to Ukraine, and is a nice starting point to exploring the countries surrounding the Black Sea. It's a regular destination for me, with very detailed scenery of this smaller regional airport.
Krasnodar Pashkovsky URKK (Krasnodar, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=46678This airport is just a short hop south from Rostov-On-Don, and was just released a couple weeks ago at the time of this writing. I have not had time quite yet to try this scenery out, but if it's anything like its FS2004 predecessor, it's very detailed, and provides for another nice jumping off point for exploring the Black Sea area. Fans of the DCS combat flightsim series may recognize the area (especially south of here along the coast) as being represented in that program. A flight between here and Tbilisi, Georgia is probably the most scenic of this area, featuring high mountaintops on one side, and coastline on the other.
Tbilisi, Georgia UGTB (UGGG in FSX)
http://www.avsimrus.com/files.phtml?action...ad&id=28921This scenery was made strictly for FS2004, but works fine in FSX. Flights from Krasnodar to here are more than reasonable, and the mountainous scenery makes for an interesting destination. Installation advisory. Make a second copy of the included AFCAD (AF2) file, and place on in the scenery/world/scenery folder, along with maintaining the one in the addon's FSX/Addon Scenery directory. This will eliminate ground texture tearing, especially on the runway. A nice, very detailed airport in a different location!
Vnukovo Airport UUWW (Moscow, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=44098One of Moscow's three main airports, this location provides for mainly domestic flights using Russia's slightly smaller, or at least less well known airlines. It's a large airport on the outskirts of the city, and it quite simply looks nice, and can serve as a nice base for airliner flights, especially using Russian equipment. A light aircraft flight across Moscow from here to Sheremetyevo (listed below) serves as a nice sightseeing trip due to many custom buildings in Moscow city.
Sheremetyevo Airport UUEE (Moscow, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=39031Another of Russia's three main airports, this one mainly serves the international market, and is the home base of Aeroflot. It's large and pleasantly detailed, and perfectly suitable for many airline operations with any of your favorite "tubeliners"! Also note the light aircraft flight recommendation listed under the previous Vnukovo entry.
Novosibirk-Tolmachevo UNNT (Novosibirsk, Russia)
http://www.avsimrus.com/files.phtml?fileid=45182The major airport in Siberia, this highly detailed FSX adaptation of the famous FS2004 original is not FSX native, but works great and preserves many of the excellent details and craftsmanship of the original. It's a big airport in the middle of nowhere, and a flight into or out of here with winter weather can really make you feel like you're in Russia!
Krasnoyarsk UNKL (Krasnoyarsk, Russia)
http://unkl.info/index-eng.phpThis airport, also in Siberia, is located a few hundred miles to the east of Novosibirsk. Luckily, a jetliner flight is more than tolerable between these two destinations and serves as a nice excuse to get both unless you enjoy flying over vast nothingness! This airport is smaller and pretty quiet, but is still capable of serving large jets.
Khanty-Mansiysk USHH (Khanty-Mansiysk, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=29882Another one in Siberia, but this one's out there on its own quite a bit. The scenery is extremely detailed and is a "payware quality" representation, but the smaller size, quieter nature, and geographic isolation of this airport may make it less appealing. If you don't mind longer flights even from "nearby" Novosibirsk, or further afield, check it out.
Beloyarskiy USHQ (Beloyarskiy, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=45183A flight between Khanty-Mansiysk and this field makes this trip tolerable, as you'll be flying between two extremely detailed airports yet with nothing in between. Another isolated yet very detailed smaller Siberian airport. If you want to feel like you're in back-woods Russia, fly into this great representation of this unknown destination!
Yuzhno-Sakhalinsk UHSS (Sakhalinsk, Russia)
http://www.avsimrus.com/files.phtml?action...ad&id=42915Russia is a huge country, and this is your connection to Japan, which is not that far way! This region of Russia came about during the closing weeks of WWII, as the Russian military undertook major operations against the Japanese. This airport may seem isolated, but northern Japan isn't that far away if you are heading south and which to check out the area.
Bonus recommendations:
Talinn, Estonia EETNtallinneetnforfsxv22.zip @Avsim.com
A very short distance from St. Petersburg, Russia and Helsinki, Finland! (There is an established helicopter route between Helsinki and Talinn due to such short distances).
Ruzyne LKPR (Prague, Czech Republic)
http://lkpr-scenery.wz.cz/en/index.phpThe major international airport of the Czech Republic, and a very good international destination with quite a variety.
Frederic Chopin EPWA (Warsaw, Poland)
epwax2011v1.1.zip @Avsim.com
One of the largest and most significant airports in Poland. Strong Russian influence before and during the Cold War.
Try out a few and let me know what you think!