Asana is a quite good project management Web base Application. You can create projects share it with your team. Assign task to your team with deadline. The best part is how easy its to use it. You can also directly assign task by directly emailing [email protected] along with to the one you need to assign the task. You can also create project specific emails too.
This was developed by developer of facebook. Hence the reliability of the service is quite good. You can create a free account and try out you self, check out at https://app.asana.com.