Scholarships are free money! You should never have to pay a website to apply for scholarships. You can earn scholarships on merit and talent (athletics, academics, arts, performances, etc) or because you meet a certain criteria (military dependents, demographic characteristics, etc.).
Many scholarships can be found on the Naviance Scholarship List located in Naviance. The school counselor will also send emails with scholarship opportunities throughout the year as she receives them.
TIP - Scholarships can be found on the financial aid websites of the colleges you are applying to. Many will require their own applications, auditions, portfolios, etc. Keep an eye out for scholarship deadlines as they are different than admissions deadlines.