NROC Dev Math
http://www.nrocmath.org
(content will eventually be on http://www.hippocampus.org)

Prealgebra book
http://msenux.redwoods.edu/PreAlgText_f10/

Elementary and Intermediate Algebra book (and video index)
http://www.wallace.ccfaculty.org/book/book.html
http://www.wallace.ccfaculty.org/videos.html

New WAMAP content with video links has been developed or is being developed for NROC Arithmetic, Redwoods Prealgebra, and Wallace Algebra.

Precalculus book
http://www.opentextbookstore.com/precalc/

Online Graphing calculator
http://dlippman.imathas.com/graphcalc/graphcalc.html

WAMAP Flashcards
http://www.wamap.org/flashcards.php
(or the more flexible verison that can be used inside WAMAP with any question: http://www.wamap.org/course/quickdrill.php)