When you hear the word 'app,' you immediately think of those small programs for your smartphone. However, an app is simply any piece of software that serves some kind of purpose, either online, on your computer or another electronic device.

With amazing new capabilities and updates to features you use every day, iOS 8 is the biggest iOS release ever. Learn more about iOS 8; The latest version of OS X features an elegant design, includes enhancements to the apps you use most, and enables your Mac and iOS devices to work together in new ways.

Some of the best and most versatile apps are available for Mac. We've compiled a list of the best free Mac apps, from well-known ones such as Dropbox and Skitch, to lesser known ones such as Adium and CheatSheet.

• Caffeine is to your Mac what Starbucks is to your mind, but, unlike Starbucks, it doesn't cost $5 to reap the benefits. The free app creates an icon on the right side of your menu bar.
• Apple TV+ is here. Start Your Free Trial 7 days free, then $4.99/month. Talk Show TV-14 Join the discussion. Start Free Trial 7 days free, then $4.99/month. Go to Show Documentary TV-14 Find your outlet. Start Free Trial 7 days free, then $4.99/month.

SEE ALSO: The 25 Best Free iPad Apps

Some of these apps can be found within Apple's App Store, while others are registered under the GNU GPL license, meaning that you can view and change the source code easily. Many of them are also compatible with various plugins and add-ons, which make it easy to customize the app to your liking.

Which free Mac apps would you add to the list? Let us know in the comments section below.

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