Since she is still in college, she would most likely be looking for an internship. She can search for those specifically online. Also, tell her to check with her school's career office. They often have local internships listed there.
As far as free work, local community organizations may want help. She can also do projects for herself and put them on github. Build an app. Build a website. Produce evidence she can code.
ps - i'm speaking at the San Diego user group next month. Tell your sister to say hi!