I have create several websites but now I am looking to restrict certain areas of my website and I am also looking to redirect a user to a certain area based on their password. I would also like to have the option to let people retrieve lost passwords. Below are a few examples of some software that I found:
http://encodable.com/userbase/
http://www.locked-area.com/
I know some people may tell me to just buy those but I am looking for a secure and trustworthy open source program. If anyone can let me know what they use I would greatly appreciate it.