Magento Quick View Product Extension makes it possible for your customers to view product details without going to a product page. Instead, clicking on a product displays products information in a light box. The information displayed can be customized with extra details, add to wishlist links, more products, short description, etc.
Magento Catalog Extensions is a Magento module which implements infinite scrolling. It adds a "More products" button to the end of products pages that displays more products without reloading the page, and automatically reloads the page once the viewer reaches the bottom of a list or grid.
Virtuemart Ajax Search Module helps your shoppers easily find products based on keyword searches. With Ajax-empowered technology, visitors do not have to wait for the whole Virtuemart page to reload to see their search results. They just need to type three characters of keywords, and the products with the same keywords will be displayed together with the product photo thumbnails and prices. You can set a number of search results to be displayed in case you have many products with the same keywords.