I'm about to convert to Mac myself but if I wasn't, I would definitely use Mac OSX Tiger Theme 1.3 to at least feel like I'd converted.

The skins feature the classic Aqua and Graphite schemes and the newly introduced Platinum scheme which you can find in the System Preferences and Mail programs in Mac OS X 10.4. They've also included Brushed with over 20 substyles added for good measure. The Apple menu is unfortunately, not an exact copy of the original but it's pretty close. It's basically a stripped down Start Menu that has been made to look like the Apple menu in Mac OS X. In addition, there are also left and right handed titlebar buttons for those that want their PC to look like a Mac but at the same time keep their right handed Windows buttons. The look and feel is remarkably Apple although Windows keeps creeping through especially with it's annoying sounds sometimes to spoil the illusion. If you have any widgets installed, you may also find that they don't show with this installed.

A great skin for those that either can't afford a Mac or those that simply prefer the elegant Mac look and style.

Download Mac OS X Theme 1.3 in Softonic

This popular customization program allows you to add skins, toolbars, and interfaces to fine tune your computer. While the trial version of Window Blinds offers a restricted number of skins, you can easily choose from the thousands available from wincustomize.com and Deviant Art, which load directly into WindowBlinds. The program barely takes any space in your hard drive and loads new themes or skins rather quickly. It is quick to install and very stable. Window Blinds also gives you a preview shot of what the design would look like.

The trial version is a bit limited as it does not allow you to use the in-depth SkinStudio, with which you can normally customize your skins by changing color, size, and background. If you’re feeling particularly creative, you can also create your own from scratch. Thanks to the new blurred glass effect you can make pretty original skins. We also found it quite easy to handle animations in the skins you created.

Window Blinds is great to create original skins of excellent quality for your desktop.

Download WindowBlinds 6.01 in Softonic

The WinCustomize browser allows you to instantly access thousands of skins, icons, themes, wallpapers and more right from an easy to use program. Not only can you access them, but the browser can directly apply them to your computer without having to interact with the underlying software. Apply your wallpapers and Windows media player skins and WindowBlinds skins directly from the WinCustomize skin browser.

Download WinCustomize Browser 2.01 in Softonic

SkinStudio is a program that lets you design your own graphical user interfaces that can then be applied to Microsoft Windows or various programs on Windows such as Windows Media Player.

It is especially useful for creating your own themes for WindowBlinds in a visual and intuitive way. The interface is structured well making it a simple procedure to modify all settings without the need to know or use one line of code.

Download SkinStudio 5.01 in Softonic

If you’re yearning to experience the dapper new Windows Vista interface but don’t fancy splashing out for an upgrade yet, then VistaXP is the perfect antidote. There’s no doubt that the XP styling is well past its sell-by date and this Visual Style provides a classy alternative modelled on the new OS.

Although VistaXP takes a bit longer to apply than most Visual Styles, you’re rewarded with a very accurate recreation of Vista’s window bars, taskbar and Start Menu. The style applies a sleek gun metal shell to your windows and program icons in the taskbar glow a brilliant deep blue when rolled over. Likewise the Start button turns a gorgeous green when you hover over it.

Unfortunately the visual style doesn’t include a Vista background or any of the innovative new desktop features of Microsoft’s latest operating system. However, by installing the Vista wallpaper and Vista Sidebar, you can get a true feel for the OS. Of course, you won’t get access to the fancy new file management tools, but it’s sure to raise a few eyebrows when your friends and colleagues pass your computer.

Download VistaXP V3 WB 3.1 in Softonic