Quandl offers free and unlimited access to 8 million time-series datasets from 400 sources spanning finance, economics, society, health, energy, demography & more. Quandl is a search engine to find the data you need; then get that data in any format you want, via instant download, our API, or any of 12 packages that talk directly to Quandl.
Quandl also covers 200+ futures contracts from 10+ exchanges, with data going back as far as the 1950s. Data indexed includes current market prices, commitment of traders, continuous contracts, and historical contracts.
Interesting Data Sets you can find from Quandl
There are too many Interesting datasets available in Quandl. However to make you understand what Quandl here are few datasets.
1)Download any dataset on Quandl in any format: Excel, CSV, text, JSON or XML.
2)Access all datasets on Quandl via a single, consistent, easy-to-use API. Or get data directly into the tool of your choice using our packages. Packages currently supported include R, Python, Matlab, Excel, Stata and more. API calls and package use are free and unlimited.
3)Every dataset on Quandl includes a link back to an authoritative source for that data, allowing you to validate its quality and accuracy.
4)Every single dataset on Quandl is the freshest possible version of that data, retrieved as recently as possible from the original publisher.
5)Every dataset on Quandl has a unique Quandl code and a permanent URL (permalink). The data is in the same place – always. Even if the original source stops publishing the data, it persists on Quandl forever.
6)Combine any two or more datasets on Quandl into supersets or multisets. These merged datasets have all the attributes of normal datasets on Quandl, including structure, permanence, freshness, API and package accessibility, transparency and easy download.
7)Use Quandl to create custom graphs of your datasets and supersets. Share these graphs on your blog or other website, using Quandl’s graph embed tool.
8)Find the precise data you need using our data search engine. Or browse our data collections, selected and organized by Quandl curators. Star your favourite datasets for quick access.
9)There is no limit to how much data you get from Quandl and there is no cost to using Quandl.
10)Free API calls are limited to 500 API calls per day.