heya!! there are tons of nclex reviewers on the internet that i think would be of great help to those who are short in moolah. i actually used these for my test because i can't afford to go to review centers or purchase those reviews through the internet.
here are some of the references that i used:
1. there are 7 of these. helped me a lot.. :)
2. youtube medication reviewers helped me understand medications better. i always had a hard time with meds, so it always takes extra concentration on my part.
http://www.youtube.com/watch?v=hzqokrnxbfw
i'm sure there are a lot more out there, but i took my test already and don't have time to review all of them.