Where Can We Find Standard PHP Applications

[nirod]

We may need some nice PHP applications but where can we find them? If we need a PHP file uploading script which has superb features like remote upload of 5GB, a progress bar,uploading files without any account, file expiration after one week,download with resume quality and at last a nice Web 2.0 uploading panel, where can we find it? And in what name the script will be called?