Steve Taylor

t1gr0u

The plugin allows to display PHP errors on the dashboard in a widget.
I’ve wrap Gyrus’s code into a plugin, you can see the original code here: 
http://sltaylor.co.uk/blog/wordpress-dashboard-widget-php-errors-log/

PHP Errors Widget

Alex King

Crowd Favorite

If you’ve decided to move things around on your site, you might overlook a few redirects and end up with some broken URLs. This will help you catch those so you can take care of them.

404 Notifier

Log 404 (file not found) errors on your site and get them delivered to you via e-mail or RSS.

PHP Errors Widget vs 404 Notifier