Algebra
http://www.mhhe.com/math/devmath/dugopolski/elem/index.mhtml --this appears to be a complete Elementary Algebra book online, with pdfs of one section at a time available if you click on "Online Learning Center" under "Student Resources". There are also interactives available.
http://www.mhhe.com/math/devmath/dugopolski/acs/index.mhtml --this is the same series--college algebra
http://www.mhhe.com/math/devmath/dugopolski/inter/index.mhtml --this is the same series--intermediate algebra.
http://glencoe.mcgraw-hill.com/sites/0003112010/
http://www.glencoe.com/sec/math/algebra/algebra2/index.htm
http://www.glencoe.com/sec/math/algebra/algebra2/index.htm
http://www.glencoe.com/sec/math/algebra/algebra2/algebra2_01/index.htm
http://www.glencoe.com/sec/math/algebra/algebra2/algebra2_05/index.php4/co
http://glencoe.mcgraw-hill.com/sites/007873830x/
http://glencoe.mcgraw-hill.com/sites/0078884829/
http://www.glencoe.com/sec/math/algebra/ca/index.htm
http://www.glencoe.com/sec/math/algebra/ca/ca_04/index.php/co/vol2
http://www.glencoe.com/sec/math/algebra/ca/ca_04/index.php/co/vol1
http://www.glencoe.com/sec/math/algebra/ca/ca_04/index.php/co
http://www.glencoe.com/sec/math/algebra/ca/ca_05/index.php/co
http://glencoe.mcgraw-hill.com/sites/0078799120/
http://www.glencoe.com/sec/math/algebra/algebra1_2/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1_2/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1_2/alg1_201/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1_1/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1_1/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1_1/alg1_101/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1/algebra1_01/index.htm
http://www.glencoe.com/sec/math/algebra/algebra1/algebra1_05/index.php4/co