Steam

Third-party add-ons

• AugmentedSteam.com — a browser extension that purports to make your Steam experience "better". Specific features that I like:
  • a price history, so you can tell if the current sale is actually a good deal or not
  • adds the ability to attach notes to your wishlist (which makes it much easier to remember WHY you added it to your wishlist in the first place)
• SteamDB.info
• (list of third-party add-ons)