I have noticed that the excellent linguistic package ExPex is no longer available on the website of the maintainer. (This package is not in CTAN and was only maintained there.) Does anyone know why? Is it no longer being developed?
I contacted the author of ExPex (John Frampton) and he was unaware of the web page issue. The issue has now been resolved, and the link in the question has been changed (although the link in the question now redirects there). He has no intentions of abandoning development of the package. It is likely that it will be uploaded to CTAN in the future.
Until the package is released on CTAN, users should continue to use this link to get the current version of the package.
ExPex has now been submitted to CTAN, so users should use their package manager or the CTAN website to keep their version up to date.