I am a senior studying computer science. I have a minor in Applied Mathematics and I have a 2.8 GPA with one semester left. Besides creating websites, what are other things I can do to impress employers when it is time to apply for jobs? How can I show my skill set? What are things I can add to my portfolio?
Get a GitHub account and be at least semi-active on it. Even just writing up issues for various open source projects out there looks good. If you see an issue listed that you think you can actually take care of, then fork the project and fix the issue then submit a pull request.