Below I list some of the resources I found very useful for my research.
Netvizz v1.3: a tool that extracts data from different sections of the Facebook platform.
YouTube Data Tools: a collection of simple tools for extracting data from the YouTube platform.
Digital Methods Initiative: methods and tools for repurposing online devices and platforms (such as Twitter, Facebook and Google).
Talk of Europe: A dataset covering all plenary debates held in the European Parliament (EP) between July 1999 and January 2014, and biographical information about the members of parliament.
TwiNL - provides researchers and students the opportunity to search through Dutch tweets.