Project Tracking software/website. Need help plzz

Question

Hi friends

i need your ideas and inputs here plzz.Suppose u have a company and u need a website where ur employees/customers/admin can login and do the work..
Work in the sense.. An employee can be assigned task for a day by admin. When employee logs in he can get the schedule for the day. Employee needs to finish the work and report back to the admin. Same way customer can give feed back on the project like for bugs and all the problems they are facing.. Which will be checked by the admin...

Has anyone dome such project? Can u`ll give me some idea how it can be done plzzz