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Links to Add-ons for Microsoft Flight Simulator and Lockheed Martin Prepar3D
Flight Sim Scenery and Airport Producers G-P
 Gaffer Simulations Airport scenery for South Africa. Includes Lanseria International Airport, O. R. Tambo International Airport and King Shaka International, Durban. Also, freeware SA aircraft livery and Johannesburg MSFS scenery
Greek Airports Project Large collection of Greek airport scenery for FS9 and FSX. Also, Greek lakes and seaport scenery. In Greek and English.
iBlue Yonder Offer highly detailed airports for MSFS that include custom night lighting for the highest level of immersion.  Dallas Love Field (KDAL) with downtown Dallas included and Portland International (KPDX).
Imagine Sim Features a collection of payware FSX & P3D airports including Kansas City, Cincinnati, NY La Guardia, Shanghai, Singapore and others. The aim is to bring the very best in flight sim scenery. KATL Atlanta for MSFS.
iniBuilds Detailed, popular scenery by their in-house team for MSFS, including Detroit, London Heathrow, New York JFK, Maasai Mara, Southampton and many more. Manage your iniBuilds Store product purchases easily with the new iniManager Application.
JetStream Designs Producers of airport scenery for FSX, P3D & MSFS featuring high details and animated scenery objects such as jetways and airport vehicles. Includes Paris Orly, Nantes, Milan Linate, Palermo, and Little Rock. Facebook...
JustSim Producers of good quality and highly detailed airport scenery for P3D and MSFS. Products include Innsbruck, Barcelona, Varna, Nice and others. Products are on SimMarket...
LatinVFR Finely detailed and crafted scenery for important airports for MSFS and P3D/FSX in South America and The Caribbean. Includes Santiago, Kingston’s Norman Manley, Sao Paulo’s Guarulhos International and several more. Also, offer Airbus models for MSFS.
LHSimulations We aim to recruit Hungarian add-on designers to work together on Hungarian sceneries and aircraft. Excellent, highly detailed payware and freeware Hungarian airport and scenery for FSX, P3D and MSFS. Budapest LHBP released.
MegaScenery Earth US photo-scenery using high-resolution aerial photos giving you a view from your aircraft just as it looks in the real world. Pay for and download just the areas of the USA you need. Includes NightScene tecnology. For FSX and P3D only.
Mex High Flight Numerous Mexican payware and freeware airports for FSX and P3D. Also José Martí Int. (MUHA) and Ixtapa-Zihuatanejo Int (MMZH) for MSFS,  All with carefully detailed 3d objects and buildings, realistic ground markings and many static objcets.
Misty Moorings (Return to) Two websites dedicated to the scenery add-ons are available for the Pacific Fjords region of North America. Includes Tongass Fjords and Misty Moorings. Misty Moorings is for FS9. Return to Misty Moorings for FSX.
MK Studios Founded in 2008, we offer highly detailed airport visualizations, including their surroundings with satellite imagery, infrastructure, special effects, and night lighting for MSFS. Includes, Dublin, Lanzarote,  Tenerife, Vagar, Kangerlussuaq (BGSF) in Greenland and Montreal (CYUL). Orbx partner.
M'M
Simulations
Producing detailed scenery of European and Turkish airports, including Izmir Adnan Menderes International, Dalaman International, Castellón Airport in Spain, St. Gallen–Altenrhein in Switzerland, Stockholm Skavsta Airport and others.
Netherlands 2000 Groundbreaking in its time, this fantastic freeware scenery for FSX and P3D depicts all of The Netherlands, including the entire road and rail infrastructure, all major airports and many smaller ones, detailed coastline and much more.
NZA
Simulations
Home of the NZA Proline™ next level airport and scenery Add-ons offering New Zealand and Tasmanian airports and scenery. Includes Christchurch and Hobart airports, Milford Sound and Tauranga regions and a couple more regions each having several airports,  Facebook...
Orbx Simulation Systems Hand-crafted, worldwide autogen, water, roads and trees scenery and detailed scenery for many regions of Australia, NZ, USA, Canada & UK. Also, we have high-quality airports and flight sim utilities. Support Forums (require registration).
Pacific Islands Simulation Well-detailed and very nicely done sceneries for FSX of small island countries and "trust" territories of the Pacific Islands region. Payware. Plus, some P3D 64-bit airports. For MSFS, they offer Salt Lake City Intl, Incheon Intl, Reno-Tahoe Intl and Cleveland Intl.
PhotoSim Labs Detailed scenery of the Commonwealth of The Bahamas. Two areas - The Berry Islands (30 sq. miles (78 km2), thirty islands, 3 airports), and South Bimini & Cat Cay (2 airports, seaplane base and helipads).  For P3D. Facebook...  
Pilot's Developers of FS Global Vector scenery, FS Global Real Weather and FS Global Ultimate worldwide high-definition mesh, all for FSX/P3D. KCDK - Cedar Key Airport for MSFS
PTSim Home of SbuilderX, a scenery creation tool by Luis Sá for FS9 & FSX. It can produce land and water class, photo and vector scenery and various placements and effects.
Pilot Experience Sim Airport scenery for French airports Saint Tropez and Montpellier Mediteranne for P3D and MSFS. Also, Tomato and PTA presets and P3D Settings Pack, a manual about getting maximum and stable performance from P3D. Facebook...
  pilotplus Developing UK airports for MSFS, P3D and X-Plane, including Oxford, Southend,  Wycombe Air Park, Bristol International and Biggin Hill. Facebook...
PrealSoft (on Facebook) PrealSoft Scenery Design and sell a range of high definitation city scenery for FSX, P3D and MSFS. Brussels, Dublin, Casablanca (city and airport),  Madrid, and Barcelona. Also new textures for grass, water and trees. Products are listed on SimMarket...
projectmax
(@simmarket)
High-quality, true-to-life airports with real-life buildings and sites recreated with ultra-high details. Includes CYZF Yellowknife Int Canada, WAMM Sam Ratulangi Int, WIGG Fatmawati Soekarno and WAHH Adisutjipto airports in Indonesia for MSFS.
Pyreegue Dev Co.
(@ Contrail)
Nestled between coastal mountains, Tivat Airport on the Adriatic coast of Montenegro for MSFS poses a unique challenge for pilots on the approach to runway 14. A good place to practice your piloting skills is MSFS. Also Belfast, Edinburgh, Glasgow and East Midlands airports.