Block Referers

Logging and Tracking your User visit History

Wise KPIs is a free plugin that displays almost 25 key performance indicators related to your WordPress website's performance.

AIWIS is the World’s Most Advanced Artificial Intelligence Website Interaction System. He talks with your visitors in many different languages.

A handy way to insert full Google Analytics tracking code on all pages.

WP-Mail-Validator is an anti-spam plugin. It provides mail-address validation in 5 ways:

Firewall protection for comments. Blocks spam before it reaches your database with automatic link filtering and zero manual moderation.