A simple plugin allows you display posts.

Cross Sell Products Display For Woocommerce using widget and shortcode to boost your woocommerce product sells.

This is an upsell and cross-sell plugin for Easy Digital Downloads. You can easily upsell and cross-sell on your EDD store with popup or on your cart/checkout page.

Maximize your sales potential with our user-friendly Cross-Sells plugin. Display related products in a pretty drawer or on a product page. Splendid!

Increase your store's average order value, conversion rate, sales, and revenues significantly with the easiest-to-use Upsell & Cross-sell builder app.

Boost Sales with DynamicBlocks | All-in-One WooCommerce Product Recommendations Suite: Upsell, Cross-Sell, Add-Ons, Bundles & More