Global

RS Components, Farnell/Newark, Mouser, Digikey, RadioShack

Europe

Austria: Physical Computing

Belgium: Tektonica, Antratek, iPrototype, Electroshop bvba, B-Electronix

Bulgaria: Robotev, Erelement

Serbia: Saperel d.o.o.

Czech Republic: HW Kitchen, PV Electronic, CzechDUINO.cz

Denmark: MemeMaker, Let Elektronik, ElectroZone.dk

Estonia: ITT Group

Finland: Robomaa.com, Paeae Technologies, Månsteri Store

France: AlyaSoft, Lextronic, Zartronic, Snootlab, Jlectronique, RobotShop, Semageek, Arobose, Mechs, Evola, GenerationRobots, Alpha-Crucis, MatLog

Germany: Segor-electronics (search for "Arduino"), ElectroDrome, Watterott Electronic, Elektronikladen | ELMICRO, TinkerSoup, reprap source, Bausteln, Antrax, EBG Darmstadt (search for "Arduino"),Fritzing Shop, Komputer.de

Greece: Knowledge Research, Internet Now, Citistore

Hungary: Fablab

Italy: Online Smart Projects (smartprojects [at] tiscali [dot] it), Robot Italy, Eshopen, EtherMania, Regali e Desideri, Futura Elettronica, EmmeShop, Homotix, 7-three.com, RobotStore, ElettroShop

Retail LED Elettronica , Milano
Siro Elettronica Via Renier 67, Torino
Femet Corso Grosseto N° 247/H, Torino

Latvia: Argus

Lithuania: UAB "IDOIN"

Norway; ROBONOR

The Netherlands: EZtronics, Turtle Creations, Machinecollective, Antratek, Doctor Bit, Freeduino.eu, FLORIS.CC, A-Blocks, Jee Labs, iPrototype, BRONTRONICS, Duinos

Poland: KrisTech, Nettigo, Robo-Hobby

Portugal: Gtronica.com, InMotion, LusoRobótica, PTRobotics, Sonigate Leiritrónica

Romania: electronista, RoboFun, Mecatronica.EU

Russia: Linux Center, Amperka, Pacpac, Domit

Slovakia: elektromodely, RLX COMPONENTS,

Slovenia: Tehnologija, Smak d.o.o.,

Spain: Libelium Cooking-Hacks, BricoGeek, e-lioness, TuxBrain, Cana Kit, Electan, Componentes Escobedos, OpenDomo, Voipminic, ardutienda, Microlog, Albacete Digital, Innova Didactic SL, Cetronic, ERA ROBÓTICA S.XXI S.L.U

Sweden: Electrokit, Lawicel, Kjell&Company

Switzerland: Dshop, Boxtec, Alpha-Crucis, Play-Zone

Turkey: Robit Teknoloji, Robomore, Yazki Bilism Hizmetleri, RoboWeb

Ukraina: Digisoft, Parts, Yevgen Fatyeyev

United Kingdom: Cool Components, SK Pang electronics, oomlout, Robotiq, RobotBits, Proto-PIC, Earthshine Electronics, Hot Solder, Technobots, DTECH, Love Electronics, Domit, Active Robots Limited, Phenoptix, http://www.hobbytronics.co.uk/!HobbyTronics

The Americas

Argentina: DitenTec, Intek electronica, OpenHacks

Brazil: Multilogica, Unite, RoboCore, BuildBot, Laboratorio de Garagem, CasaDoRobo

Canada: RobotShop, Lee's Electronic, SpikenzieLabs, Creatron Inc., Proto Advantage, Cana Kit, Solarbotics, eWerksonline,

Chile: Ingeniería MCI

Colombia: Dynamo Electronics, Tienda de Robótica, ELECTRONICA I+D

CostaRica: Crcibernetica

Ecuador: Digytronic, APM MICRO

Mexico: ElectroLabo, Pictronico, Cero-Uno, 5 Hz Electrónica, RoboDacta, Carrod Electrónica, ElectronicaEstudio, Sandorobotics, cosasdeingenieria, 330ohms

Panama: TecnoFutura

Uruguay: Bluetip

USA: SparkFun, Maker Store, Adafruit Industries, Little Bird Electronics, Modern Device, FunGizmos, NKC Electronics, Gravitech, RobotShop, Liquidware, Hacktronics, MakerBot Industries, Microcontroller Pros, Curious Inventor, AeroQuad, CuteDigi, EIO, Teach me to make, UltiMachine, Electrojoystick.com, Electronics is Fun, AME - After Midnight Engineering, Trossen Robotics, Jameco, Zagros Robotics, Advanced Micro Circuits Corp, iHeartEngineering, 3D Robotics, Jaycon Systems, Elexp, Abra-electronics, Reuseum,

Middle East

Israel: Dash Electronics, 4Project

Jordan: eshtre.com

Asia and Pacific

element14

Australia: Little Bird Electronics, Toys Down Under, RobotGear, Australian Robotics, ProtoGEAR, Squarebit

China: Seeed Studio Depot, DFRobot

India: Simple Labs, rhydoLABZ, 9 Circuits, PearlLabs, Cat Systems,Tenet Technetronics, Explore Labs, MGsuperLabs

Indonesia: Gerai Cerdas, Famosa Studio, Digi-Ware, Zaada Tec

Japan: MechaRoboShop, Switch Science, Strawberry Linux, Techand, MicroFan, Kyohritsu

Korea: Plug House, MakeZone, ArtRobot, Eleparts

Malaysia: Homebrew & Technology, Rocket Scream, Masa Cipta, Cytron Technologies Sdn Bhd, E-Shore Technologies

New Zealand: Co-Lab, MindKits, nicegear, Robotronic

Singapore: sgBotic, Robot R Us

Thailand: Thaiduino

Taiwan: PlayRobot, ARoboto

Vietnam: Sotatec

Africa

Egypt: Future Electronics Egypt, Egyrobots

South Africa: Netram Technologies, Yebo Electronics, Micro Robotics

Tunisia: HMZ

Nigeria: Satajanus Bots