The WOT addon for Internet Explorer and Firefox warns you when you are about to connect to a web site that contains spyware, adware, viruses, internet scams, credit card fraud, phishing, lottery scams, or simply has a poor user rating.

There are a bunch of things you can do at no cost that will make your Wordpress installation more stable and secure.
Keep Wordpress and all of your plugins up to date – Many upgrades include security enhancements. Wordpress 2.7 and higher versions offer automatic updating of your Wordpress installation as well as your plugins.
Do not [...]

Here’s the plugin that you hope you never need – Next Of Kin
What this plugin does is monitor your visits to your Wordpress admin and notify you and/or the person(s) that you choose if you haven’t visited in a definable number of weeks. So, it will basically let the chosen person(s) know if you have [...]