Steam Inventory Helper - Steam Inventory Helper is a free browser extension for Google Chrome that adds a big amount of new features into the Steam trade-offer system & Steam store functionality.

Augmented Steam - Enhanced Steam fork by IsThereAnyDeal.

Steam Tools Hub - A set of Steam related WebApps built around trading cards, emoticons and backgrounds.

Steam Market History Plus - Steam Market History Plus is a browser extension that comparatively provides more valuable Steam market history.

Search items between steam friends. - This browser extension is useful in finding the items for in all steam friends inventories simultaneously.

SteamWizard - SteamWizard is a browser extension that helps in providing additional information for CS: GO items on the Steam community market.