FCE Practice
The FCE Trainer, by Flo-Jo
http://www.flo-joe.co.uk/fce/students

Biscuit software
http://www.english-online.org.uk/fce/fcehome.htm 

OF Course! Lots of exam practice, with advice and feedback from expert examiners. BY Austin 
http://www.ofcourse.info/index.shtml

Commercial organisations
pass ENGLISH EXAMS
Multimedia Software for the Cambridge Examinations, Certificates & Diplomas
www.pass-english-exams.com