You can find audio books and other material at libraries and there is a lot of language help available on the Internet, free of charge.

你可以在图书馆找到音频和其他资料，互联网上有很多可供免费下载的语言学习资料。

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Freeware is software offered free of charge, downloadable off of the Internet.

免费软件就是不要钱的文件，可以从网上下载。

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Many of these features are now available free of charge over the Internet, in tune with a broader move by Microsoft to offer more of its applications over the Web.

很多这类功能如今都可以免费从互联网上获得，这也符合微软通过互联网提供更多应用程序的更广泛举措。

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Question Box is a service that provides answers free of charge for people who cannot search the Internet directly.

VOA: special.2009.10.12

Being tracked online is the price we pay for getting to wander the Internet free of charge.

FORBES: How much does Google know about you? There's an app for that.

But what if you wanted people to use your Internet free of charge?

FORBES: How To Get Free Internet When A Stranger Uses Your Wi-fi

Early MOOCs have been offered free of charge to anyone in the world with an internet connection.

FORBES: Online Ed Gets An Honesty Test, Via New Coursera Initiative