Joel Feldman, Richard Froese, Brian Wetton and others.
These are the lecture notes for UBC's Math 152 Linear Systems course on linear algebra and applications.
The notes have been in-use since at least 2004 and many people have contributed over the years. A UBC Skylight grant supported some student work during 2009.
pdflatex notes.tex
The canonical repo for this document is at github.com/UBCMath/Math152notes where you'll find an issue tracker.