Several community projects aim to preserve XAPs:
: Part of the official Windows Phone 8.1 SDK, this tool allows for direct manual deployment of XAP files to a connected device. windows phone xap archive
For those looking to preserve the legacy of Windows Phone, the XAP archive Several community projects aim to preserve XAPs: :
Because the official store is gone, XAP files are the only way to install legacy apps. At its core, a XAP file is a
Without active preservation, the unique UI paradigms and applications of Windows Phone will be lost to digital decay—reducing one of the early 2010s’ most distinctive mobile platforms to screenshots and memories.
At its core, a XAP file is a compressed package based on the standard . It typically contains: Compiled Code : Application logic often stored in DLL files.
XDA is where the magic happens. Search for threads titled "[REQ] Working XAP Archive for Lumia 520" or "Collection of Offline XAPs." This is the most reliable source for XAPs—files that bypass the signature check entirely.