Approximately 850 food products analysed for sugar content by the USDA nutrient data laboratory (2007) can be found in the following links.

The estimate of the total sugar content is based on the sum of monosaccharides (galactose, glucose, and fructose), and disaccharides (sucrose, lactose, maltose). The food items are organized in the order of high to low sugar content.

Foods with high, moderate, low and zero sugar content list

Diabetes management: Low carbohydrate diet --an overview
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Diabetes management: Low carbohydrate diet -- conclusion

Blood sugar management related articles:
Low blood sugar cookbooks

Data source of sugar content in foods: USDA National Nutrient Database for Standard Reference, Release 19.