Todoyu: Get tasks done with your team

Todoyu is an Open Source, web-based projects/tasks management, time tracking and team collaboration developed with php. Todoyu will help you bringing your team and clients together to work jointly on projects.
With the help of todoyu you will be able to manage multiple
projects, overview your customer’s data, assign tasks, share files, group calendars, meet deadlines, plan resources, send invoices and many more.

FEATURES:
Project management
Time-Tracking
Teamwork and Collaboration
ToDo-List
Access for customers
Web-based
Addresses
Calendar
Administration
Invoicing
Resource planning

Download
http://sourceforge.net/projects/todoyu/files/todoyu%202.0/todoyu_2-0.zip/download

http://www.todoyu.com/en/ it's Open Source, it's Free and you can download to sourceforge with best speed