This list provides links to sites that provide library-related job listings. There are sites for many academic and school library jobs, as well as government jobs. Be aware that sometimes public library jobs are posted on city websites.
Be sure to sign up for the SLIS LISTSERV if you haven't already; job opportunities are regularly distributed there. Some alumni even choose to stay on the list, so it can be a great resource.
Please let your librarian know if you have any suggestions of links to add.
These sites, while not specifically focused on libraries, will allow you to limit your results to library-specific jobs and are another great resource to look into when searching for jobs.