Big data sets you can use with Open Source R
Open Source R is a statistical programming language used by millions of analysts worldwide. If you are not familiar with it, you can view the short introductory YouTube video before proceeding.
If you are familiar with it, you'll be interested to learn that there are readily available lists of data sets you can use for examples, teaching, showcasing machine learning algorithms and developing statistical analyses.
Joseph Rickert has an excellent post in Revolution Analytics highlighting the data sets that can be found in the lists and explaining how they can be used. You'll find that post well worth the read, especially if you are looking for a sample data set or you just enjoy browsing data repositories.
In short, this is a great way to find data on the Internet quickly.