Which is the best browser to test HTML5 pages?

This site (link) tests browsers for the support they provide for
HTML5. They test  various aspects of HTML5 code to arrive at the rating.   

Please access the site for further details here:

http://html5example.net/static/html5test/

These are some of the browsers I use and I am not sure they are
the latest. But you can see that Google Chrome Version 28.0 support most of the functionalities of HTML 5.

What is OpenOffice?

This is the free stuff that you can use if you cannot afford Microsoft Office. The installation is easy. The size of file is small. You also need to install Java Run time. You don't need to know Java for this, but the OpenOffice uses Java for some of the automated internal programs.

You can do most of the things you do in Microsoft with this. You can even open Microsoft documents.

Follow this link for details about from where to download.

http://hodentek.blogspot.com/2013/08/short-of-cash-get-apache-openoffice-40.html