Responsive and modern error 404 page.
For Genesis Framework: Allows modifying of default layouts for homepage, various archive, attachment, search, 404 pages. Plus: up to 9 new layouts!
By using this smart plugin, you can fix all 404 error links by redirecting them to homepage using the SEO 301 redirection.
Redirect all 404 errors to a specific page
Fixes 404 error bug in wp category page while using custom permalink structure. Now added support for custom post types by using snippets from jdantze
After upgrading to WordPress 3.1.x, many installations suffer broken permalinks for categories and tags. This hotfix repairs the problem.
Fixes 404 error when attempting to view paginated custom post type category listing page greater than one
Loads a dafualt image in the place where an image path is returning 404