How can I use WordPress as a job board ? (but free)

I wish to use WordPress installation for a job board. Looking online I found the following two posts that give a list of options:
http://www.wpmods.com/turn-wordpress-into-job-board/
http://skyje.com/2010/01/job-board-solutions-for-wordpress/

But all of the options (except 1) cost money.

Is there a free (good) solution for WP job board (theme/plugins) ?

I think what you want to do is add a custom post type for a job posting. Take a look at this example custom post type which should give you a good template for creating a job post.

In the past (before 3.0) I have used the Magic Fields plugin to add a custom post type for “Jobs” by adding the fields I want for job posts.