Virtual Machines are instanced computers that allow for experimentation, emulation of other operating systems, and even dangerous activity like malware analysis to happen within a temporary and confined environment. WSL on Windows is a great way to integrate a Linux workflow into your existing experience, but it doesn't provide you with a full desktop OS with a GUI.
If you're looking for an enterprise solution, you will likely need to pay for the licensed versions of the most popular VM software to avoid terms of use issues. However, if you're looking for some personal use options there are a handful of great VMs that work great and are easy to setup.
Oracle's VirtualBox is open-source, and it works on even old versions of Windows, should you be clinging to some ancient hardware. Performance-wise in our use, it's not quite on par with VMware, which is why it takes a runner-up spot, but for many, it will definitely be a better choice.
Nothing is hidden behind a paywall, and Oracle still supports VirtualBox even to this day. If you spin up VMs often, it's a solid tool to have in your arsenal, supporting both Windows and Linux VMs (only Mac users can install a Mac VM in VirtualBox.)
Oracle also supplies a range of pre-built virtual machines targeted at developers and there's an official plugin pack that adds some useful extras like USB pass-through, RDP, and disk encryption. It's a shame it looks a little dated, and sometimes it feels like setting up a VM takes a few steps too many. But you can't argue with the quality, especially when it will always be completely free.
You've probably heard of VMware, and you probably assume it comes with some fairly hefty price attached. That isn't totally untrue, but it's far from being true. VMware Workstation Pro is a completely free-to-use version of its desktop VM software, which is now only paid for enterprise use. Broadcom recently acquired VMWare and one of the moves it made was to kill off the previous free offering, Workstation Player, and allow folks to use Workstation Pro instead.
Perhaps surprisingly, VMware Workstation Pro also doesn't command particularly high-end hardware to run. Naturally, the more resources you have, the better your VMs will run, but even on a lower-spec machine, you're not excluded. You may run into some compatibility issues on some hardware if you're trying to virtualize Windows (nested virtualization), but it's still absolutely possible, alongside any Linux distribution you can think of.
Workstation Pro also provides additional tools like GPU virtualization, USB pass-through, and the VMware Tools plugins allow you to seamlessly shut down and suspend VMs without having to have them open. At its heart, VMware Workstation Pro is really easy to use, with some more advanced features if you want to dive a bit deeper. Performance is also really good. However, the one big downside to it is that since Broadcom's acquisition, you now need a Broadcom account to even download VMWare Workstation Pro. If this doesn't sit right with you, then you'll be better off with Oracle's Virtualbox.
If you're in need of a simple solution, and you'd rather not tinker with additional software, there is of course Hyper-V, which is built into Windows 10 and Windows 11. Or it is if you're using the Pro version or Windows Server. Unfortunately, on Windows 10 Home and Windows 11 Home, you simply cannot use Hyper-V.
That's probably the biggest negative, in that it's hidden (sort of) behind a paywall. But while Hyper-V is fairly basic, it's user-friendly, and assuming you're not looking for advanced features like GPU acceleration, it's a perfectly good tool to use.
Guest OS support extends to Windows, Windows Server, and Linux, and while you might run into some compatibility issues with some Linux distros, on the whole you can expect to have a good experience.
Which should you choose?
While the free version of VMware Workstation Pro is one of the more extensive VM services with a ton of features, the requirement to have a Broadcom account now to get it may well be a dealbreaker.
VirtualBox is a bit antiquated in its look and feel, that being said, it is open-source and Oracle continues to support it. It has the great benefit of being able to say "It just works" and there is pretty low stress when using it. If you're not enjoying VMware Workstation Player, give VirtualBox a try and see if it meshes better with you.
Hyper-V doesn't have all of the bells and whistles of Virtual Box or VMware Workstation Player. That being said it's integrated into some versions of Windows and is basically the Microsoft Notepad of VM options, so it works for something quick and dirty, but if you want to get some real work done you should open up Microsoft Word.