MarketSquare.com: Online mall for quirky local stores.
San Francisco Bay Area Shopping: Comprehensive site with links to more than a thousand local shops.
San Francisco Entrepreneur: Free directory resource for business entrepreneurs. Weather, news and local business resources.
San Francisco Merchants: Directory of businesses and merchant associations, by neighborhood.
sfSurvey: San Francisco reviews by people who have sampled restaurants, stores, service providers, cultural venues, and entertainment.