Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
PHPmaker - PHPMaker is a powerful automation tool that can generate a full set of PHP quickly from MySQL, PostgreSQL, Oracle, Microsoft Access, Microsoft SQL Server and SQLite databases.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
P4A - Php For Applications - PHP5 RAD Framework based on Zend Framework.
EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.
MT Backend - MT backend is a PHP control panel solution for websites.