Yith
A rather strangely named set of premium and free plugins for WooCommerce.
We have a developer licence with these clever people and use their plugins on the WooCommerce sites we build.
Their range of plugins enable a wide range of customisation options to WooCommerce and make things easier to manage when running your shop or setting it up.
They also have a wide range of plugins that can make the experience on your site much better for the customer, such as wishlists, points and rewards and gift cards!