Woocommerce Wishlist Wordpress Plugin allow your visitors/customers to add products to their wishlist intended to purchase later or share with their friends. This plugin also handles/supports product variants. For more details look into the features listed below:

Features List
Adds Wishlist button in Single Product Page.
Various options to place wishlist button.
Various options to control the flow based on actions in wishlist page.
Share to friends with email share option. This feature can be Enabled/Disabled.
Wishlist URL can be private/public accessible.
Change visualization
Wishlist button (same as theme colors of ‘Add to Cart’ or choose font and background colors).
Add to cart button in wishlist page (same as theme colors of ‘Add to Cart’ or choose font and background colors).
Can include custom css to handle wishlist and Add to Cart buttons.