Greasy Fork is available in English.
"Check multiple checkboxes with ease by drawing a box around them to automatically select them all." Converted from nrlz's amazing CheckBoxMate Firefox Add-on (https://addons.mozilla.org/en-US/firefox/addon/9740). Works with Firefox 3.6.3.
This was not made by me. I'm just reuploading from CheckBoxMate for Greasemonkey. If you are the scripts original creator, shoot me a message after you've uploaded your script.