Easy and quick to use, with geographies including census tracts, zip codes, and block groups. Also has 2000 and 1990 Census data. When a geography is selected, click "Data Sources for area". From Missouri Census Data Center.
Previous Census Bureau database; replaced March 2020 by Data.Census.gov
Easy-to-use interface to find Census data using a point location (latitude and longitude) and radius "values" (i.e., miles) for major Census statistics - population, age, race, household income, educational.. For SF 1 data. From the Missouri Census Data Center.
2 presentations from Paula Wright (of the Census Bureau Dallas office) at the 2011 Spring DLC meeting in San Antonio. First set of slides: Census Data Access (general info.); second set of slides: American FactFinder (detailed info.). At end, a 4-pg. handout on "How do I look for a specific table number?". 45 pages total.