Applications of PDF files nowadays are very common, no matter for individual demands or for work. It's very convenient to upload, read, and share documents via using PDF format, naturally, it's very necessary to have a powerful PDF tool on the computer to help us read and create pdf files. Here are five PDF tools that are downloaded for many times, if you haven't gotten one or want to try new software, keep reading.

1. eXPert PDF Reader. From the name we can know that it's designed to read PDF files, which most PDF readers can do that too. So what are its special features? Except the common functions, it is available for users who use different operation system, no mater Window XP, Window Vista and Window 7. Moreover, we know that run an app will slow down the system and that's really troublesome, well, this software won't. Hard to explain, but it doesn't effect your other operations, so maybe this is what you want.

2. PDFlite. As you know, English is not the only language in the world, even it's used very widely. So if an application can support more than one language, then I think it will be more popular and chosen by more people in different countries. So my point is PDFlite has this kind of function, it is available in English, Spanish, French, Chinese, Russian, Dutch, Japanese, and many more languages. Of course, it also can convert any document to PDF,

3. Aloaha PDF Signator. This software may have a little difference with the ordinary PDF tools. It's not designed to create and convert PDF files, which are the features that most people need. However, to fix some special problems, this software is definitely needed. Aloaha PDF Signator can sign any existing PDF Document. The Aloaha PDF Signator is completely PKI neutral and will work with PKI components from any vendor (this includes CAs, certificates, CRLs, OCSP responders, smartcards). You can now open, view and navigate PDF documents directly within PDF Signator. Thus allowing you to view and sign the document all from the same application.

4. PDF Converter. I have tried this tool to convert pdf to html on mac, and it works fine, so if you have the same demands to change PDF to HTML, this one is the best choice, very simple interface and just a few steps.

5. Aloaha PDF Saver. Well, obviously, this tool has a very simple but powerful function, which is it can save all documents in PDF format, so if you want to change your files into PDF, consider this one, on additional features, but to get a very direct and straightforward result, it's the one that you should choose.

Now, after knowing all these PDF tools, I bet you won't be troubled by how to make the most of PDF, just choose a good helper, everything will be easy.