Locked Area
- A password protection and member's area management system. Features automatic sign up, email validation and confirmation, bulk mailings and duplicate account checking. Free and commercial versions.
- http://www.locked-area.com/

Pitbull PRO
- A Perl member management script gives webmasters the ability to create and maintain a secure members only area that their visitors can signup either for free or for charge to access. [Commercial]
- http://www.pitbullpro.com/

Password Robot
- Perl and MySQL-based password protection program that manages access to multiple password protected directories, automatically deactivates expired accounts, disables abused accounts, sends personalized HTML e-mail. [Commercial]
- http://passwordrobot.com/

htEdit
- For creating and maintaining .htaccess files to password protect website directories.
- http://cgi-central.net/scripts/htedit/

Site Entry
- Set up members-only access to content, products, documents for safeguard access. [Shareware]
- http://www.webgenie.com/Software/SiteEntry/

Membership Gateway
- Automates the task of collecting payments and issuing passwords for restricted pages. Compatible with PayPal and Authorize.net.
- http://smartelf.com/elfgate.html

MembershipClientPRO
- A software solution for both password protection and membership management.
- http://www.membershipclientpro.com/

Widexl - CGI scripts
- Programs written in Perl for password protecting and guarding web pages.
- http://www.widexl.com/cgi_scripts.html

Password Sentry
- A tool for paysite webmasters to protect their site from password traders. Test drive Password Sentry using online demo. Free installation and upgrades service. [Commercial]
- http://www.monster-submit.com/sentry/