Stickies displays your notes and messages on your desktop.

top of other windows in a collapsed 

Quickly browse the web without slowing down your Mac.

browser tabs or windows. Furthermore, Firefox provides 

Expand over 30 formats: StuffIt, Zip, RAR, 7z, tar, open encrypted segmented or split files easily.

recent versions of Windows and Mac 

Toast Titanium is an all-in-one CD/DVD burning suite.

It is a single-window app that can...of the application's window ...be accessed on Windows as well...from within a single window 

Alternative Web browser with server-side compression for slow connections.

seamlessly integrated with Windows, Mac, and Linux 

This application enables you to watch movies on your Mac.

example, it has a Windows-like appearance 

Family of powerful x86 virtualization products for enterprise as well as home use.

2003, Vista, Windows 7, Windows 8, Windows 10), DOS/Windows 3.x, Linux (2.4, 2.6, 3.x 

Parallels allows you to run Windows and Mac applications side by side.

you to run Windows and Mac...view to make Windows...keep the familiar Windows background and controls...Mac. Now Supporting Windows 10 

This application helps you optimize the performance of your Mac.

was designed for Windows PCs, Macs 

The Kindle app is optimized for the iPad, iPhone, and iPod touch...

based device, and Windows Phone 7-based device