This lecture introduces an array of data sources that can be used to create new applications and visualisations, many examples of which are given.
Additionally, there are a number of slides on open data standards, freedom of information requests and how to affect the future of open data.
This is a set of slides and a tutorial exercise which we used to teach people the basics of RDF and how they can manipulate data in this format to make quite powerful web pages very simply. It is not intended as full introduction to RDF and it's subtleties the aim is to teach the very bare minimum to be able to do something quickly. It empowers programmers to go away and play with linked data.