www.purplemath.com – consists of lessons and practice problems for a variety of math topics

www.khanacademy.org/– features video tutorials on many math topics

http://www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/-

Algebra tutorials by West Texas A&M University - the Beginning and Intermediate Algebra tutorials cover many of the topics taught in Algebra I (and more!)