Management Project Software

What good online project and event management softwares are available?

I am looking for a project management software that has a task manager function, calendar and that's preferably customizable to my organisations needs. Ideally, I would like such a software to have an event management function also. Is there anything like this online? This could be something that is pay monthly (or yearly) or a one off purchase. Thanks!

Public Comments

1. You can use free open source software. Mozilla Thunderbird provides the email and address book functionality. Mozilla Lightning extension to Thunderbird has calendar and task management features. By installing this extension, you will have a full fledged Personal Information Manager (PIM). Both these products are from Mozilla, the same company that provides the popular Firefox web browser. For details see here: http://www.smb-soft.com/common-software/business-applications/13-task-and-schedule-management-personal