Going eCommerce? Some of the plugins you'll want are right here!
WooCommerce is a flexible, open-source eCommerce solution built on WordPress. Sell anything, anywhere and make your way.
WooSidebars adds functionality to display different widgets in a sidebar, according to a context (for example, a specific page or a category).
The YITH Woocommerce Cart Messages plugin let you add custom messages in the cart page and/or in the checkout page.