Speedboxes as a Drupal module to easily check or uncheck a selection of checkboxes on a site.
In many cases when you assign permissions to a role you have to check many single checkboxes. With that module you just have to select the boxes by "left click and drag the mouse" over them. Then a small toolbar appears and you can check, uncheck or invert the checkboxes state. On big sites with many roles and permissions this will save a lots of time!