A jobboard is not really an app, it's just a list, simply speaking. Anyway, most of these are applications from the implementors view. Which jobboards did you liked and why? Which jobboards did you use and found useful in the past? Background: I am doing a short report on the internet jobboard landscape at the moment, so links or short answers would be a great help for me! Thanks 
Which jobboards do you liked and used?
usability
Jobster has a nice user interface and experience; not sure about its effectiveness.Stack Overflow Careers rocks :)LinkedIn has a good jobs section