NostalgiaVX is not a single piece of software. Instead, it is a curated series of and appliance packs designed for VMware, VirtualBox, and QEMU . The "VX" stands for "Virtual Experience," and the project's goal is simple: to recreate the look, feel, and hardware compatibility of operating systems from the late 1990s and early 2000s.
If you absolutely cannot trust any pre-built image, you can replicate NostalgiaVX manually. nostalgiavx download
: NostalgiaVX is a "supporter" shader, typically available to Tier 2 Patrons (€5) on developer RRe36’s Patreon, with occasional Tier 1 access. NostalgiaVX is not a single piece of software