Magento Bestseller Products Extension

1=  http://www.magentocommerce.com/magento-connect/bestseller-products-7401.html
2= http://www.magentocommerce.com/magento-connect/bestseller-selected-on-category-id.html
3= http://www.magentocommerce.com/magento-connect/bnm-best-selling-products-new-products-and-most-viewed-products.html

Magento / WordPress Integration Recent Posts Block

http://fishpig.co.uk/wordpress-integration/docs/recent-posts-block.html

Enhanced Catalog Product Grid – Custom Attribute Filter

http://inchoo.net/ecommerce/magento/enhanced-catalog-product-grid-custom-attribute-filter/

Custom ‘Sort by’ drop-down menu options

http://www.magentocommerce.com/boards/viewthread/20437/