http://www.aps.k12.co.us/tts/csap.htm
CSAP online practice tests
Scroll to the bottom of the page for more practice tests

http://www.cde.state.co.us/cdeassess/astest.htm
Sample writing and Reading questions from CDE

http://www.cde.state.co.us/cdeassess/csap/asrelitems_index.htm
CDE released items

http://www.inetlibrary.com
Sign up for a free trial and it has a section titled "Ready Set Test" that has CSAP-style questions.