Steam Inventory Helper is a free app (or website) designed to make managing your Steam inventory easier. It allows you to quickly sort, filter, and organize your Steam items, as well as check market prices, set price alerts, and track item history. It also provides a dynamic badge viewer and a convenient way to search for items. With this tool, you can easily view your Steam collection, sell or trade items, and make sure you never miss a great deal. So, if you're a Steam user, this is definitely a must have tool.
Enhanced Steam
Steam Tiles
Steam Trader Helper
Discontinued As of July 2018, the extension has been discontinued. See http://www.enhancedsteam.com/blog/?p=256