Foxit is free for both commercial and private use. Foxit does provide an enterprise Reader that is tailor made for commercial users that require easy software deployment within their server environment.
If all you are doing is viewing PDF documents, then the free version should be fine. If you are editing or creating PDF documents, then you should probably contact them and see what they think your best options are. They have enterprise options, but you may be able to get away with just a single copy of the software, and only using it on one computer with one user. I couldn't find anything prohibiting it in their EULA, but you should contact sales and get a statement and quote from them:
Sales: 1-866-680-3668
Support & General: 1-866-MYFOXIT
OR 1-866-693-6948
Email: sales@foxitsoftware.com
Founded in 2001, Foxit is a leading provider of innovative PDF and eSignature products and services, helping knowledge workers increase productivity and do more with documents. Foxit combines easy-to-
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