Log 404 Errors Under Tools
Records the addresses visitors request that do not exist, with hit counts, last seen time and referring page, and lists them under Tools > 404 Log so you can fix or redirect them.
Snippet Library
Redirects snippets for WordPress
Snippets that send visitors where they should go: redirect after login or logout, from attachment pages, old URLs and empty searches, or to a maintenance page. Quick fixes when you only need a few redirects, not a redirection plugin.