The Refugee Rights Data Project gathers and reports solid data on the refugee situation in places like Calais and Chios. For one recent report - Six Months On - I supplemented it with an interactive visualisation using stick figures as an alternative to standard charts like pie and bar chart.
The aim was to humanise the data in a somewhat novel way, mapping responses into properties of the figures (like gender and age) and having them dynamically regroup in response to survey questions.
Dice is a job board for Tech Professionals with vast data on the skills companies are looking for and those that candidates are offering.
By combining these elements of supply and demand, it is possible to come up with a valuable measure of the 'heat' of a particular skill. I was able to advance an earlier visualisation for much easier insight and enhanced experience all round.