Auxrames is a Web-based PHP tool that allows human resources management. It is designed to manage a team with lot of tasks. You can see holidays (yellow), non-working time (purple), and tasks (green, depending on the workload percents). You can perform user management, import users from your LDAP and possibly AD, and set different groups. Each of your team members can be allocated to one or more groups. You can decide to always display a user even if he has no tasks, so as not to forget him.
HN_htusers is a PHP class to manage users and groups in Apache Web server environments, with optional extra information for users. It uses Apache-style MD5-crypt passwords. It uses built-in CSS styles. Validation (min-max length, allowed characters) is built-in for all entries. The locking mechanism is robust. It includes examples of how to test your setup, how to embed a dynamic form for changing passwords into existing HTML code, using HTTP-Auth with .htaccess files in directories, and using HTTP-Auth without .htaccess files but with PHP.