Or you could use one of the SQL Managment tools. I have used Idera SQL DM and found it quite good. Quest & Redgate have similar tools, which although i have not used, are supposed to be pretty good.
They become very valuable when you are managing more than a handfull of servers/instances.
One thing these tools have over Ola Halegren's script is they usually have a report that shows you tables that are fragmented most often (which is what you are asking for in the thread title). Ola's script will get you the tables that are most fragmented at this particular moment, but it wont tell you that table ta_22343 or whatever spends x% of its time above 50% fragmentation.
they can be a tad pricy if budget is tight though.