This simple force-directed graph shows character co-occurence in Les Misérables. A physical simulation of charged particles and springs places related characters in closer proximity, while unrelated characters are farther apart. Layout algorithm inspired by Tim Dwyer and Thomas Jakobsen. Data based on character coappearence in Victor Hugo's Les Misérables, compiled by Donald Knuth.
Compare this display to a force layout with curved links, a force layout with fisheye distortion and a matrix diagram.
Another example of a force-directed layout graph but where the nodes are limited to annuli of different sizes based on their data. I used the term concentric circles as it was a little clearer: https://bl.ocks.org/davidcdupuis/3f9db940e27e07961fdbaba9f20c79ec
Hope this might interest a few!