https://steam-beta.madjoki.com (some parts still under construction)
Indicates sections that requires login with Steam Account.
List of bundles available on Steam
List of your apps.
List of unowned DLC for owned games
List of Apps Banned from Steam API and Profile
List of unowned free apps
Search for Related Apps
Packages not listed in any store page or a bundle
Apps available only in certain regions
Packages that come with extra copies as inventory gift, like 4 packs. Some are granted only if you own it already.