The genealogy website Mocavo has made its US census indexes and record images available for everyone--without subscribing to their "gold membership." All US census records, from 1790 to 1940, will be accessible. www.mocavo.com.
Mocavo, a genealogy-related search engine, has been around for several years. Much of its content was free, but eventually there was an opportunity to subscribe to the "gold membership" for further searching. The cost of that membership at present is $9 per month. Last year Mocavo was acquired by FindMyPast.