There are plenty of databases which are free and you can use to begin your research.

We began by listing the data sets which are validated because they have been submitted by a reputable source, e.g. the government itself or a public organization e.g. WHO and UN. We have also included data sets from major media and publishers here. Most of them are free although there are also data sets for purchase. This is by all means not the only sources of information.

Validated (Government or reputable enough sources, e.g. media)

WorldBank

Google PublicData 

UN Data 

Guardian Data 

Data Market Azure by Microsoft Data sets for purchase

 

Unvalidated (Public or user submitted data sets)

Factual

Freebase 

Crunchbase - technology and startups

Socrata

Datamob

Quandl

Datamarket - An extensive library of datasets

 

Some more resources

Infochimps Data APIs for purchase

Datawrangling – A long list of URLs to check out for data sets. We noticed that some of the URLs expired and are no longer in use.

 

Several apps which you use on a daily/weekly basis that contains a wealth of information you could use in an infographic

Web analytics: Google Analytics

Social networks: FacebookTwitterPinterest/ LinkedIn

Project management tools: Basecamp

Sales management tools: Salesforce

Survey tools: SurveyMonkey

Photo sharing tools: Flickr

Email marketing: MailChimp