Back in April, Microsoft announced that it was opening up the Game Bar on Windows 10 to third-party developers, and that it will include a store where you can download third-party widgets. Today, that store is going live, along with a couple of other new Game Bar features.
The majority of Microsoft's blog post outlines some of the widgets that are available in the new store. One is called Ghost, and it's specifically design as a companion to Destiny 2. It keeps track of your gameplay and gives you a shortcut to "bounties, quests and triumphs". Microsoft also says that you don't actually have to have the game, as it also keeps track of your account stats on Bungie.net, along with achievements.
Another one is the XSplit Game Bar HUD widget, which was announced alongside the store back in April. It's designed to be a powerful tool to create live-streams. Another one that was previously announced is Corsair iCUE, which lets you customize your lighting effects. Right along those lines, there's a Chrome RGB widget from Razer that has similar functionality.
There are also a couple of new features coming to Game Bar. One is called click-through, and it's meant to give you control over whether a click lands on a widget, or on the game underneath it. The other is the ability for widgets to support transparency.
All of these features are available now. If you don't have them yet, you can update the Xbox Game Bar through the Microsoft Store.