iVLSM is the intuitive voxel-based lesion-symptom mapping toolbox. You can analyze structural MRI data to create overlay lesion maps. Also, you can analyze lesion-symptom relationships.
Update log: Ver 2.0 (March 16, 2017): Added logistic regression analysis
Ver 1.1 (Feb. 22, 2017): Bug fix for p-value computation.
Ver 1.0 (Sep. 1, 2016): Now, iVLSM is working with spm12.