Citrix VDI-in-a-Box is described as 'makes the benefits of desktop virtualization available to businesses of all sizes. This easy, affordable, all-in-one VDI software appliance enables desktop IT to rapidly deliver centrally-managed virtual desktops for less than the cost of new PCs' and is a Virtualization tool in the network & admin category. There are seven alternatives to Citrix VDI-in-a-Box for a variety of platforms, including Linux, Windows, Self-Hosted solutions, Mac and Online / Web-based. The best alternative is Paperspace. It's not free, so if you're looking for a free alternative, you could try IsardVDI or UDS Enterprise. Other great apps like Citrix VDI-in-a-Box are flexVDI, GDaaS, FOSS-Cloud and RavadaVDI.
FOSS-Cloud (FOSS-Cloud software and hardware) is an integrated and redundant server infrastructure to provide virtualization- and cloud-services, Windows or Linux based SaaS-, Terminal Server-, Virtual Desktop Infrastructure (VDI).