Microsoft ended support for the Xbox 360 Store in July 2024, but the modding scene is more active than ever. New tools like allow themes to include Lua scripting—meaning animated weather widgets, Discord Rich Presence, and real-time clock displays are now possible on an 18-year-old console.
A legacy modding forum. A bit dated, but their "Xbox 360 Themes" archive contains absolute gems from the golden era (2012–2015). xbox 360 aurora themes
For the truly dedicated, you can combine elements of multiple Xbox 360 Aurora themes. For example, you might love the background music from one theme but the button layout from another. Microsoft ended support for the Xbox 360 Store