Quandl is a data platform. The data can be shown on the website. It contains financial, economic and social data.
Link to Quandl
Here is link to Tutorial for Quandl
Enigma is amassing the largest collection of public data produced by governments, universities, companies, and organizations. Concentrating all of this data provides new insights into economies, companies, places and individuals. It does not only contain financial data, but also other public data, such as transportation, environment data, etc..
Fannie Mae and Freddie Mac
The Housing and Economic Recovery Act (HERA) of 2008 requires certain information be made publicly available. Data on mortgages acquired by Fannie Mae and Freddie Mac, which regulated by FHFA, supplies mortgage lenders, planners, researchers, and housing advocates with information concerning the flow of mortgage credit and capital in America’s communities.
Federal Home Loan Bank System
The Housing and Economic Recovery Act (HERA) section 1212 requires the Director to make available to the public, in a form that is useful to the public (including forms accessible electronically), and to the extent practicable, census tract level data relating to mortgages purchased by each Federal Home Loan Bank.
The content of these files are unaudited and are reported directly by the Federal Home Loan Banks to FHFA. Questions concerning the content of these files should be directed to the relevant Federal Home Loan Bank(s).
Federal Reserve Economic Data | St. Louis Fed
The Federal Reserve Economic Data provides free U.S. and international economic data, graphs and other data-related tools, plus quality research from St. Louis Fed economists.
Explore hundreds of free data sets on financial services, including banking, lending, retirement, investments, and insurance. Start using these data sets to build new financial products and services, such as apps that help financial consumers and new models to help make loans to small businesses.
AssetMacro offers Free Historical Data for Leading Indicators of Economies and Market Data for Global Stocks, Bonds, Commodities and Currencies.
OECD.Stat includes data and metadata for OECD countries and selected non-member economies.
US Department of Treasury
Database for US Treasury Department.
Publicly available data source for company information and filings.
Open data is free, publicly available data that anyone can access and use without restrictions. U.S. Federal Open Data is a strategic national resource. American businesses depend on this government data to optimize their operations, improve their marketing, and develop new products and services. Federal Open Data also helps guide business investment, foster innovation, improve employment opportunities, and spur economic growth. The following link will give you more details.
Kaggle is a platform for predictive modeling and analytics competitions in which companies and researchers post data and statisticians and data miners compete to produce the best models for predicting and describing the data. The following link will give you more details.