Antiques
925-1000.com hallmarks/maker’s marks/silver marks encyclopedia
AADLA antiques/fine arts organization
ACMOC Antique Caterpillar Machinery Owners Club
Antique Radios vintage radio collecting
Antiques and the Arts antiques/arts trade
Antiques Trade Gazette antique/art news
ASCAS antique silver collectors association
Atwater Kent Radio Atwater Kent radios information
automaticwasher.org washing machines
carpetencyclopedia.com carpet encyclopedia
DATAMP American machinery/tool patents directory
EnginAds advertising pages for antique engines
Farm Collector vintage farm equipment
Friends of Ferguson Heritage Harry Ferguson tractors
gotheborg.com antique Chinese/Japanese porcelain
InstAppraisal antique/art/collectible appraisals
ISRM slide rules
kilim.com carpets/rugs
Kovels antique/collectibles price guide
Library of Congress research library
makearadio.com crystal/tube radios
mytractorforum.com tractor forums
Nostalgia Air antique/vintage radio references
oldengine.org old engines
oldtools.co.uk antique/used woodworking tools
philcoradio.com Philco radios
Phil’s Old Radios antique radios
Preston Services steam engines suppliers
Prices4Antiques antiques/collectibles auction prices database
Red Star Radiosite Soviet antique radio gallery
RedSquare Wheel Horse forum
rugrabbit.com antique rugs/carpets/textile arts marketplace
Scott Antique Markets antique show
Shorpy vintage photography blog
silvercollection.it antique silver collection
Smokstak antique engines
TEFAF antiques/art/design fair
The Ferguson Club Ferguson tractor owners club
The Textile Museum textile museum
The Typewriter Database typewriter serial number information
The Valve Museum valves
The Valve Page vintage televisions/tube radios collection
thepotteries.org Stoke-on-Trent potteries
TMC textile museum
Tractor Forum online tractor community/resource
Tractor Shed antique/vintage tractors
Vacuumland vacuum cleaners
victor-victrola.com phonographs
Vintage Tractor Engineer vintage tractor maintenance/repair tutorials
Yesterday’s Tractors antique tractor parts
Audio
Audio Geek Zine music production articles
Audio Ideas Guide hi-fi/home theater magazine
Audiofanzine music gear news/reviews
Audioholics online audio/video magazine
Audiokarma home audio stereo discussion forums
Audiophilia online audiophile journal
audiorecording.me home music production tutorials
AudioReview audio component review site
audiotools.com audio/video hardware archive
Chris VenHaus DIY resource for audiophiles
Classic Speaker Pages classic speakers information
DIY Audio Projects DIY audio project collection
diysubwoofers.org subwoofer DIY
enjoythemusic.com audiophile equipment reviews
gearslutz.com pro audio community
Head-Fi headphone news/reviews
hifiloudspeakers.info KEF speakers forum/information
Home Brew Audio audio recording lessons
Home Studio Corner music production tutorials
homerecording.com music recording forum
Hometracked home recording/project studio blog
Humble Homemade Hifi loudspeaker projects
klaus-boening.de tube amplifier projects
LA Audio File audio equipment reviews
Lansing Heritage history of audio engineer James B. Lansing
minidisc.org MiniDisc community portal
naks.com Nakamichi cassette deck resource
Pass DIY amplifiers/loudspeakers/preamplifiers projects
Positive Feedback audio arts forum
Pro Audio Files tutorials on mastering/mixing/producing music
Production Advice music production advice
RecordingHacks audio recording news
Remote Central universal remote control reviews
Roger Russell information/photos of McIntosh equipment
sansui.us Sansui classic audio/vintage stereo information
Sonic State music technology news/reviews
Stereo Times audiophile magazine
Stereophile high-end audio magazine
subwoofer-builder.com subwoofer DIY
t-linespeakers.org transmission line speaker information
The Analog Dept. vinyl LP hardware information
TNT-Audio hi-fi audiophile magazine
trustmeimascientist.com audio/music magazine
Tuner Information Center vintage stereo tuners information
UCSB Cylinder Audio Archive cylinder recording archive
UHF Magazine high fidelity magazine
Zaph Audio DIY speaker projects
Autos
Acura luxury vehicle manufacturer
Audi luxury vehicle manufacturer
Audi USA luxury vehicle manufacturer
AudiWorld Audi forums/news
Autoblog car news/reviews
auto-data.net online automotive catalog
autoevolution automotive news/car reviews
Autoweek car culture magazine
BMW luxury/performance vehicle manufacturer
BMW USA luxury/performance vehicle manufacturer
Car and Driver automotive enthusiast magazine
CarBuzz car news/reviews
Carscoops car news
Chevrolet automobile manufacturer
Chrysler automobile manufacturer
ClubLexus Lexus forums/news
Dodge automobile manufacturer
Ford automobile manufacturer
General Motors automobile manufacturer
GMC truck/utility vehicle manufacturer
Honda automobile/motorcycle/power equipment manufacturer
Honda Automobiles Honda automobile sales information
HowStuffWorks Auto explanations of auto accessories/equipment/parts
Hyundai automobile manufacturer
Jaguar luxury vehicle brand
Jalopnik automotive culture/car news
Jeep off-road/sport utility vehicle manufacturer
Lamborghini luxury sports car manufacturer
Lexus luxury vehicle manufacturer
Mercedes-Benz luxury vehicle manufacturer
Motor Authority auto news
Motor Trend automobile magazine
NASIOC North American Subaru Impreza Owners Club
netcarshow.com car pictures/wallpapers
NHTSA National Highway Traffic Safety Administration
Nissan USA automobile manufacturer
Peugeot automobile manufacturer
Popular Mechanics popular science/technology magazine
Porsche high-performance sports car manufacturer
Renault automobile manufacturer
rennlist.com Porsche enthusiast site
Road & Track automotive enthusiast magazine
Speedhunters car tuning weblog
Subaru automobile manufacturer
Suzuki automobile/motorcycle manufacturer
The Car Connection car review site
Top Gear automobile magazine
Volkswagen automobile manufacturer
Volvo Swedish luxury vehicles company
Vwvortex Volkswagen enthusiast website
Aviation
Aero-News Network aerospace/aviation news
Aeromodelling GR aeromodelling in Greece
AIN Aviation International News
Air & Space aviation/flight technology magazine
Air Sports Net aviation news/weather
airfleets.net reference site for aircraft/airline fleets
Airliners aircraft photo database/aviation forum
AOPA Aircraft Owners and Pilots Association
AvCom aviation discussions
Aviation Week news service for aerospace/aviation/space industries
Avionics avionics industry analysis/news
AVweb aviation news
b737.org.uk Boeing 737 Technical Site
BALPA British Airline Pilots’ Association
Boeing aerospace/defense company
CAA Civil Aviation Authority
carnoc.com Chinese civil aviation web portal
CASA Civil Aviation Safety Authority
Cessna general aviation aircraft manufacturer
Cirrus Aircraft aircraft manufacturer
Cross Country hang gliding/paragliding/paramotoring magazine
DGCA India national civil aviation authority of India
DHV German hang gliding/paragliding association
dropzone.com skydiving community
EAA Experimental Aircraft Association
FAA Federal Aviation Administration
FAI World Air Sports Federation
Flightradar24 global flight tracking service
FLYER general aviation magazine
General Aviation News newspaper covering general aviation
Heliguy drone retailer in UK
homebuiltairplanes.com homebuilt aircraft discussion forum
ICAO International Civil Aviation Organization
Kent Gliding Club gliding club in UK
liveatc.net live audio feeds of air traffic communications
MiGFlug aviation/space adventure company
MILAVIA military aviation website
NAV CANADA Canada’s air navigation service provider
NTSB National Transportation Safety Board
Plane & Pilot information source for general aviation pilots
planespotters.net civil aviation database
rcuniverse.com radio-controlled model articles/forums/market
Red Bull X-Alps paragliding race
Royal International Air Tattoo military air show
SACAA South African Civil Aviation Authority
Skydive Arizona skydiving center
Skydive Perris skydiving center
SkyVector aeronautical charts/flight planning
Trade-A-Plane aviation marketplace
XContest online hang gliding/paragliding contest
Birding
10,000 Birds birding blog
ABA American Birding Association
ABA Birding News birding news
ABC American Bird Conservancy
ABC African Bird Club
All About Birds bird guide
Bird Watcher’s Digest birding magazine
BirdForum online birding community
BirdGuides bird news
BirdLife Australia bird conservation/research organisation in Australia
BirdLife Switzerland bird conservation group in Switzerland
BirdNote podcast/radio show about birds
Birds of North America encyclopedia of bird species in Canada/US
birdwatching.com birding website
BOU British Ornithologists’ Union
British Bird Lovers information about bird watching/garden birds in UK
British Garden Birds British garden bird guide
BSC Bird Studies Canada
BTO British Trust for Ornithology
Carolina Raptor Center raptor conservation organization
Cornell Lab of Ornithology bird conservation/research institute
Ducks Unlimited Canada waterfowl habitat conservation organization
Dutch Birding ornithological magazine
eBird online database of bird observations
Fugle og Natur Danish nature site
greglasley.com birds/wildlife photography
HKBWS Hong Kong Bird Watching Society
hummingbirds.net online resource about hummingbirds
ncwildlife.org North Carolina Wildlife Resources Commission
NestWatch nesting bird monitoring program
OBI Oriental Bird Images
Operation RubyThroat website about attracting/studying hummingbirds
Optics4Birding bird watching equipment store
ornithomedia.com French birdwatching/ornithology website
RSPB Royal Society for the Protection of Birds
Rutland Ospreys Rutland Osprey Project online
Scottish Seabird Centre seabird conservation/education charity
sdakotabirds.com information/photographs about South Dakota birds
Sialis information about bluebirds
Sibley Guides identification of North American birds/trees
Skye Birds Skye birding guide
SOS Sussex Ornithological Society
tristatebird.org wildlife rehabilitation organization in Newark
Tucson Audubon Society bird conservation organization in Arizona
USGS PWRC MBR North American bird population change information
whatbird.com bird identification guide
Wildlife Acoustics bioacoustics monitoring systems
WWT wetland/wildfowl conservation charity in UK
xeno-canto bird sound database
Boating
470 Sailing International 470 Class Association
ANSA Annapolis Naval Sailing Association
ASA American Sailing Association
Boat superyacht guide
boat-ed.com boating education courses
boatdesign.net boat building/design site
boaterexam.com online boating safety courses/exams
Boating powerboat magazine
boattest.com boat reviews/tests
BoatUS American association of boat owners
BSC Budworth Sailing Club
Canal & River Trust charity responsible for maintaining waterways in England and Wales
Cannes Yachting Festival boat show
Crewseekers sailing yacht crew agency
Cruising World sailing magazine
Equasis Electronic Quality Shipping Information System
findacrew.net international online boat/crew network
iBOATS boating forum
Latitude 38 sailing magazine for Northern California
Le Boat boating vacation company
Locaboat Holidays canal boat hire in Europe
Mariners’ Museum maritime museum
noonsite.com planning site for cruisers
OARS adventure travel company
optiworld.org International Optimist Dinghy Association
ORC world governing body for offshore sailboat racing
PassageMaker cruising magazine
Power & Motoryacht magazine for powerboat owners
Practical Boat Owner British yachting magazine
Practical Sailor boats/sailing gear reviews
PWCToday personal watercraft discussion forum
RYA Royal Yachting Association
Sail sailing magazine
Sail-World sailing news network
Sailing Anarchy sailboat racing e-zine
Sailing World performance sailing magazine
Saône Bateaux houseboat rental in Burgundy, France
Scream And Fly performance boating online community/magazine
SCYC South Caernarvonshire Yacht Club
SpinSheet Chesapeake Bay sailing magazine
USPS nonprofit educational boating safety organization
Whitewater Guidebook information about whitewater kayaking/rafting
Wilderness Aware Rafting Colorado whitewater rafting trips
Wildwater rafting/ziplining in southeastern US
World Sailing world governing body for sailing
Yachting World sailing/yachting magazine
yachtsandyachting.com sailing news
ybw.com motorboating/yachting news
Zoar Outdoor rafting/ziplining in New England
Camps
ACA American Camp Association
acanynj.org American Camp Association, New York and New Jersey
Adventure Treks summer adventure camps
Aloha Foundation education programs/family camps/summer camps
Alpengirl teen summer adventure camps for girls
ARCC adventure travel programs/community service
Bunk1 parent portal software to camps
Camp Belknap summer camp for boys
Camp Billings summer camp
Camp Champions summer camp
Camp Courageous recreational/respite facility
Camp Good Days residential summer camp for children with cancer
Camp Lee Mar special needs overnight summer camp
Camp North Star summer camp
Camp Ondessonk residential Catholic youth camp
Camp Quality children’s cancer charity
Camp Robin Hood summer camp
Camp Shane weight loss camps
Camp Waldemar summer camp for girls
CampBrain camp management software
campk.org summer camp
CampMinder summer camp management software
Campwise camp management software
Cloverleaf Ranch day/resident camp
Crowe’s Nest Farm summer day camp
Ekocamp English/French summer camp in Canada
ESF summer camps
EXACT Sports college exposure camps/ID clinics/recruiting camps
holeinthewallgang.org medically-supervised summer camps/programs
iD Tech summer computer camp
indianacres.com summer camp
kidscamps.com camp directory
Mountain Camp summer camp
Oak Crest Day Camp summer camp
Outward Bound outdoor education programs
Overland summer trips
Pali Adventures summer camp
RLT teen summer travel programs
SIG academic summer programs
SOAR ADHD summer camps
Space Camp space camp
Summer Discovery pre-college enrichment programs
SummerTech summer coding camp for kids
Summit Vision indoor/outdoor adventure education
Surf Camp surf camps/lessons
Trail Blazers summer camp
Ultimate Camp Resource camp games/skits/songs
Vista Camps summer camp
Westcoast Connection teen travel
Wilderness Adventures teen adventure summer camps
Climbing
14ers.com resource for climbing in Colorado
8a.nu global climbing news
AAC American Alpine Club
ACC Alpine Club of Canada
Access Fund rock climbing advocacy group
alpineascents.com climbing school/mountain guide service
AMGA American Mountain Guides Association
BMC British Mountaineering Council
Boulders climbing gym
camptocamp.org mountain sports community
castle-climbing.co.uk climbing centre in UK
Climb Europe hiking/rock climbing/walking in Europe
Climbing climbing magazine
climb-utah.com canyoneering/mountaineering
Earth Treks climbing center
Flagstaff Climbing climbing gym
Gripped climbing magazine
Guide Dolomiti Dolomites guide
Hangar 18 indoor climbing gym
Hardrock indoor climbing in Melbourne
IMG International Mountain Guides
indoorclimbing.com Indoor Climbing
MBA Mountain Bothies Association
MetroRock climbing center
Mountain Trip mountain guide service
mountain.ru Russian climbing site
mountain-forecast.com mountain weather forecasts
NZAC New Zealand Alpine Club
peakbagger.com mountain peak database
Peakware world mountain encyclopedia
Planet Granite climbing gym
planetmountain.com mountain magazine
risk.ru outdoor portal in Russia
RMI Expeditions mountain guide company
Rock and Ice climbing magazine
shastaguides.com Shasta Mountain Guides
Sportrock rock climbing gym
summitpost.org mountaineering website
SuperTopo rock climbing guide info
T4C climbing performance website
The Mountaineers nonprofit outdoor community
theCrag bouldering/rock climbing platform
Touchstone Climbing climbing gym
UIAA International Climbing and Mountaineering Federation
UKC climbing/mountaineering website
Vertical Endeavors indoor rock climbing gym
warriorsway.com mental training for rock climbing
yamnuska.com mountain adventure company/mountaineering school
Collecting
Absolut vodka
absolutads.com Absolut Vodka advertising gallery/news
Alibris media marketplace
Allnumis banknotes/coins catalogs
Badger & Blade wet shaving community
Banknote World collectible banknotes/coins
BoC Bank of Canada
Brickset LEGO set guide
Cardboard Connection memorabilia/sports card resource
CCF coin collecting
Coin World coin collecting/numismatic magazine
CoinArchives searchable archive of past coin auctions
coinflation.com current melt value of coins
Collectors Society online community for collectors
Colnect collectables catalogs
CPU-World CPU collection
Demco products/services for libraries
Department 56 holiday collectibles/giftware/ornaments
EuroBillTracker euro banknote tracking website
fratellowatches.com watch reviews/stories
Hess Toy Truck toy truck
Hot Wheels die-cast toy cars
hpmuseum.org The Museum of HP Calculators
INMR technical articles for power industry
Jack Daniel’s whiskey
Jim Beam whiskey
Kellogg’s food manufacturing company
LEGO construction toy
Lladró art porcelain figurines
mennica.com.pl Mint of Poland
mint.go.jp Japan Mint
Numista catalogue of world coins
Panini trading cards
Pepsi soft drink
PepsiCo beverage/food/snack corporation
Postcrossing postcard exchange project
PSA Professional Sports Authenticator
rebelscum.com Star Wars collecting news
rlalique.com information on René Lalique and his works
seateddimevarieties.com Liberty Seated Dime
The Pen Addict pen review site
The Royal Mint mint in UK
timezone.com information for watch enthusiasts
Toys for Tots USMCR program for less fortunate children
tradingcarddb.com archive of trading cards
TTPM baby product/pet product/toy reviews
uCoin international catalog of world coins
usmint.gov United States Mint
yojoe.com G.I. Joe action figure database