neurosynth.org
Neurosynth is a platform for large-scale, automated synthesis of functional magnetic resonance imaging (fMRI) data.
It takes thousands of published articles reporting the results of fMRI studies, chews on them for a bit, and then spits out images that look like this:

An automated meta-analysis of 823 studies of language


Database Status

386455 activations reported in 10903 studies

Interactive, downloadable meta-analyses of 3342 terms

Functional connectivity and coactivation maps for over 150,000 brain locations