Right_Click anywhere to add a node, Hold CTRL + Drag from-to node to add an edge.
Click and Drag a node to move it, Click a node/edge to select it.
Press Delete to remove a selected node or edge
Use Mouse wheel to zoom in and out
Click and Drag on empty space to move the current view
To use it all you need to do is to paste an adjacency matrix (0’s and 1’s) on the textarea and click the ‘Load’ button to plot it. You can also add and delete nodes/edges using mouse and keyboard shortcuts (see instructinos above). I plan to add more features as I need or you guys ask (can’t promise anything but, hey, ideas are always welcome =D) so ping here once in a while, it may have some new tweaks to play with.