Flickr, LiveJournal, Orkut, YouTube, and Facebook data
Data from our IMC'07, WOSN'08, WWW'09, WOSN'09 papers and Alan Mislove's PhD Thesis is publicly available by emailing Alan Mislove at amislove (at) mpi-sws (dot) org. Each of the data sets has been anonymized to protect the privacy of the social network users. We thank Akshay Bhat for his discovery of an attack and fix for our photo timestamp anonymization scheme.

Twitter topology data
Details of data from our ICWSM'10, and ICWSM'11 papers can be found here.

Twitter spammer data
Details of data from our WWW'12 paper can be found here.