i remember there is a joomla plugin for this , but for this you will need create a joomla website and then use that plugin , it has many features like most downloaded , recent upload etc , but you will have to place files on your server
yes in Joomla,you can use Docman or Remository to have a great download site and the Joomla administration is also very easy. Once,the site is et up and well built,you can have an awesome Download site.. if you need any further help,then im always here. But if you are looking for Turnkey download site script,then i need to search my database a bit.. I will let you know then Hope,my words helped you.. Thanks..