I have implemented a system called Grade-It that handles turn-in and grading of students' programming assignments at the University of Washington. Grade-It is now being used in our CS1 and CS2 courses as well as various other programming-intensive courses for our CS majors.
The following is a brief pictorial summary of several of Grade-It's major features. Grade-It is developed solely by Marty Stepp. It consists of over 26,000 lines of PHP, 14,000 lines of JavaScript, and 2700 lines of CSS styles.
Grade-It is not currently available for download or for use outside the University of Washington. But posting its code and making it available for distribution is an eventual goal once the code becomes a bit more generalized to suit other universities.
Highlighted Features: