KanbanFlow - KanbanFlow is a Lean project management tool allowing real-time collaboration between team members. Supports the Pomodoro technique for time tracking.
Laravel - A PHP Framework For Web Artisans
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Fat-Free - PHP micro-framework designed to help you build dynamic and robust Web applications - fast
Kantree - Kantree is an adaptable and intuitive project manager for the enterprise.
Slim Framework - Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.