Ever wanted to use a regular WordPress page when a 404 Not Found error is generated? WordPress has support for dedicated home and posts pages but leaves everything 404 related to the theme designer with no option for specifying custom title or content.
Custom 404 Error Page plugin resolves that problem by allowing users to set any static page as the 404 error page right from the WordPress dashboard.
While the plugin is currently hosted on GitHub, I have applied for it to be included in the official plugin repository. If you would like to help translate the plugin, please visit the translation project on Transifex.