sjFilemanager - open source ajax filemanager based on PHP, but JS part can use different backend. For more details go to http://freaksidea.com/javascript/show-1-sjfilemanager-besplatnyi-ajax-fail-menedzher
XajaxGrid is a cross-browser JavaScript grid control that represents data in a sortable DHTML table. This component allows you to design quicky user interface by organizing your data into configurable dynamic grid, buffering and dynamical loading.