I have created (or will be creating) various tools, which make the task of being an instructor somewhat easier. They are free to use, and if you would like to modify them somehow, feel absolutely free to e-mail me and ask for the source.
I have always had a very hard time learning peoples names. So I coded a small program, that uses the images students upload to the course website to help with this task. This only works for courses hosted with CourseAdmin (Calculus and courses at CS), and is only really useful if a large percentage of the students have uploaded a photo to courseadmin.
Divide the weekly exercises among the students easily! The script parses the exercise list, so all you have to do is copy paste it from the weekly notice.
Update: fixed a bug that meant that in semi-rare circumstances, a student might be assigned the same exercise twice.