Bazaar is a new app store for GNOME with a focus on discovering and installing applications and add-ons from Flatpak remotes, particularly Flathub. It emphasizes supporting the developers who make the Linux desktop possible. Bazaar features a "curated" tab that can be configured by distributors to allow for a more locallized experience.
Bazaar is fast and highly multi-threaded, guaranteeing a smooth experience in the user interface. You can queue as many downloads as you wish and run them while perusing Flathub's latest releases. This is due to the UI being completely decoupled from all backend operations.
It runs as a service, meaning state will be maintained even if you close all windows, and implements the gnome-shell search provider dbus interface. A krunner plugin is available for use on the KDE Plasma desktop.