Exception logging with sentry, see http://www.getsentry.com
The extension is a wrapper for https://github.com/getsentry/sentry-php
$ composer require networkteam/sentry-client
After installation via composer the configuration setup has to be run.
$ vendor/bin/typo3cms extension:setup sentry_client
It's also available in TER: http://typo3.org/extensions/repository/view/sentry_client
Set the dsn (http://public_key:secret_key@your-sentry-server.com/project-id) in the Extension Manager and you are done.
You can use $GLOBALS['USER']['sentryClient']
which is an instance of \Raven_Client to add your own tags or log messages.
Example: Add a custom tag
$GLOBALS['USER']['sentryClient']->tags_context(['release' => '201802072115']);
This extension is managed on GitHub. Feel free to get in touch at https://github.com/networkteam/sentry_client