Nationalnonprofits.org is fully free and easy to use. You can search by a specific organization and geographical location in order to find the opportunity that is right for you. This website sadly does not give many internship options, however, they do have a few. Most of the opportunities found on this job board are full-time job positions, so it might be best to use this site for post-graduation. You can apply for each opportunity directly through the website.
Foundationlist.org is great for those looking for specific foundation jobs. Sadly, this website does not feature any internship search tools and is mainly for those finding part-time and full-time non-profit work. Each opportunity has a “How To Apply” section, where it lists the requirements and also whether to apply through the Foundationlist website or if you will be redirected to the company website.
Check out our previous review of Idealist.org, which is another great tool for those interested in working in the non-profit industry. Foundationlist also has a list of other nonprofit job boards here.