Beginning in September 2017, there is a new URL for John Locke Resources and related sites: http://openpublishing.psu.edu/locke/
The current URLs (this should include all pages on the site) will be redirected automatically to the new URL.
As a result of my retirement from Penn State, there has been a new agreement with Penn State University Libraries regarding the hosting and future development of the sites. Things should continue without significant changes for the next sixth months; after that, there may be announcements of changes to the design and functioning of the sites.