Google Summer of Code is a program that provides stipends for university students to write code for open source software projects over the summer. The goals are to get more developers involved in open source projects, provide experience for students, and generate new code. Students work with mentors on proposed projects from March to August, completing evaluations along the way for payment. Over 10 years it has involved thousands of students from around the world who collectively wrote an estimated 50 million lines of code.