Linear Algebra - MathWorld - LinearAlgebra.

http://mathworld.wolfram.com/topics/LinearAlgebra.html

Elements of Abstract and Linear Algebra - An online textbook on abstract algebra with emphasis on linear algebra.

http://www.math.miami.edu/~ec/book/

Elementary Linear Algebra - Lecture Notes by Keith Matthews, 1991

http://www.numbertheory.org/book/

Linear Algebra Class Lecture Videos - Professor Strang's Linear Algebra Class Lecture Videos.

http://web.mit.edu/18.06/www/Video/video-fall-99.html

Matrix multiplication: an interactive micro-course for beginners - Matrix multiplication: an interactive micro-course for beginners.

http://www.mai.liu.se/~halun/matrix/matrix.html

Unification of System of Linear Equations, Matrix Inversion, and Linear Programming - This site extends the existing one-way connections among the following solving linear systems of equations, matrix inversion, and linear programming.

http://home.ubalt.edu/ntsbarsh/opre640a/partXII.htm

Notes on Linear Algebra

http://www.math.hawaii.edu/~lee/linear/