There are many- you will need to be very familiar with the exam and its tricks and traps, so try some
exam papers. If you want a coursebook, there are many. I quite enjoyed using
Masterclass, though there are many others, all doing much the same, like
Focus, etc. On-line courses- if you don't want to pay, there's free stuff, but not in a sinlge place- try
floe-joe, try
here for practice.
A word of warning: before purchasing any online course, check the site out very carefully- there are a lot of dreadful sites just out to rip you off. Be very suspicious of any site offering ebooks saying things like 'how to ace the FCE'- these are generally cowboy sites set up by site generating programs and the products they sell are rubbish. Make sure it's a serious site before parting with any money. Anyway, if you look around, you should find plenty of free stuff.
Start with the UCLES website and othe info about the board. Do the advanced tests and quizzes
here. Check out free sites
here and
here.
Good luck.