Nothing but advanced toll not available in free version. www.esri.com has provide lot of information about Arc GIS. Simply you go to find anything in this website.
Thank you for your reply, but I've a problem with the Arc Gis Explorer Online. If I need to add data from an Excel table, I gets information "Maximum number of records allowed (250) was exceeded." So my question is: whether there are other restrictions. I can't find no answer to this question, nor on the website of ESRI nor in Google ...