North America
ThomasNet - United States: Currently provides info for over 500,000 businesses listing over 65,000 detailed industrial product categories.
MacRae’s Blue Book – North America: Over 1,200,000 industrial companies and 50,000 product headings.
IQS Directory: Manufacturers in over 180 industrial categories operating in the US and Canadian OEM marketplaces.
China
Alibaba: China focused. Over 40 product categories ranging including industrial and electronic components, apparel and food products.
Global Sources: Covers 14 world regions with strong focus on China. Information on over 5.7 million products and 260,000 suppliers.
Made In China: Consumer goods, industrial supplies, raw materials and services from China.
Europe
Wer Liefert Was?: Uncovers over 620,000 suppliers in 64 industries operating in Germany (wlw.de), Austria (wlw.at) and Switzerland (wlw.ch).
EuroPages: Over 2.5 million companies. Focus is on Europe, but other regions are covered as well.
Global
MFG Contract Manufacturers: Contract manufacturers for assembly, CNC, investment casting, injection molding and other sectors.
GlobalSpec: More than 122 million parts from suppliers across the industrial sector along with searchable specifications.