Create custom 401 and 403 error pages with any WordPress theme without writing a single line of code, set it up and forget it.
Extreme Advanced debugging plugin for seeing the verbose of the verbose debug info. Tech Support, Server Admins, WordPress Developers, Plugin Develop
Puts a ribbon on the website if the user browser is older than expected.
Display comment form errors nicely!
Airbrake collects errors created by WordPress and it's plugins.
Development tool for WordPress to track bugs, manage crons, permalinks and much more.
Add capability to capture technical problems faced by users on any post or pages on the WordPress website / blog.
Browser Blocker allows you to pick and choose which browsers(versions) can access your web page and which ones are given a blocked splash screen.
Prevents plugins from showing deprecated errors in the WordPress admin.
Taming WordPress and PHP errors and displaying them properly.
Display PHP errors as WordPress admin alerts
Allow 404 errors to redirect to a specific page (as a 301).
Catches php errors, and reports last 25. Can also email the results. Good for debugging themes and plugins.
Timber is a general-purpose error-logging and alert system for WordPress.
Create more useful 404 error pages, including email notifications for bad links.
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