A website where anyone can create a profile, post articles, upload files, view files

I need a website where any one can create a profile, post articles by providing different title names , categories names and tag names(some by drop down menu and some by entering manually), upload files(ppt,pdf,doc,photo) and can manage own files and profiles. Any one can view articles, search articles by different categories wise or by entering keywords. Can view files online by swf slideshow(with full screen and without full screen), can download the original file( .ppt, .pdf, .doc, or image files), Can print the article, share the articles by social media, can email, can like by facebook or googleplus , easy navigation, fast loading, search engine optimized, valid html and css. Admin control panel to view the number of files uploaded and downloaded, users registered, daily and monthly visitors, page views. etc