The Skilled Migration Program, also known as the General Skilled Migration Program, is for people who have skills in particular occupations required in Australia but are not sponsored by an employer. The visa given is often referred to as a skilled migrant visa or a general skilled migration visa.
With the exception of the Graduate, Subclass 189 (NZ Stream) and the Subclass 887, you must first submit an Expression of Interest. You then have to wait to be invited to apply for the visa. Before submitting and EOI you should first obtain a skills assessment and undertake your English Test.