Data is everywhere, created and used by just about anyone. The days when companies or individuals had to pay significant sums of money to access useful and interesting datasets is long gone. Here is our top 20 list of the best free data sources available online.

1. Data.gov.uk the UK government’s open data portal including the British National Bibliography – metadata on all UK books and publications since 1950.

2. …

Open data has several definitions but our preferred one at Data To Value is from the Open Data Institute – ‘Open data is data that anyone can access, use and share.’ Simple really but there is a follow-on – ‘For data to be considered ‘open’, it must be published in an accessible…