WordPress Landing Pages is a plugin that creates landing pages (a.k.a. conversion or splash pages) for your WordPress site. It gives site owners the ability to monitor and track conversion rates, run a/b or multivariate split tests on landing pages, and most importantly increase lead capture!
The landing page plugin was specifically designed with inbound marketing best practices in mind and will help you drive & convert more leads on your site.
The plugin is also fully extendable and has a number of actions, filters, and hooks available for use.
Download: http://wordpress.org/extend/plugins/landing-pages/