Some of the useful resources on linear algebra :
http://www.math.unl.edu/~tshores/linalgtext.html
http://hverrill.net/pages~helena/linalg/linalg.html
http://www.numbertheory.org/book/
http://www.millersv.edu/~bikenaga/linalg/linanote.html
Online Book link : ftp://joshua.smcvt.edu/pub/hefferon/book/book.pdf
http://cisstweb.cs.jhu.edu/resources/software/cis/