With the Relative Posts plugin widget you can show up on the sidebar a list of related articles with or without thumbnails very easy.
More Plugins
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SMEPay: UPI Gateway for WooCommerce
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Access Keys for WP Navigation Menus
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MoeSec Security – Comprehensive Malware Scanner & Security Suite
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Restore PayPal Standard for WooCommerce
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Custom Highlight Color
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Easy Image Widget
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WOWRestro – Online Ordering System For WooCommerce
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EU Order Withdrawal Button for WooCommerce
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oEmbed Manager
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Popular Posts
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Tab Return Notifier
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Quantcast Quantifier
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DataPocket – Connect product data with your design tools
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Branded Social Images – Open Graph Images with logo and extra text layer
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Super Easy Testimonials
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Multi-Carrier EasyPost Shipping Methods & Address Validation for WooCommerce
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Limit Orders for WooCommerce
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Simple Social – Sharing Widgets & Icons Updated
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Advanced Datepicker – Restricts Date for Contact Form 7
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Custom Product in Woo Order