Open-source

The most popular site engine. The reason is ease of installation and use.
Which does not mean that you do not have to study it. We all learned how to work with the MS Word, browsers ... You also just need to take time for it.
Because of that most people choose WordPress and as a result is creted huge choise of templates and plug-ins.

Initially WordPress is like a CMS for blogs, but we can use it as a CMS for blogs or a regular website. Simply in the control panel we assign the start page of the site. And then we choose to add information to pages or records. That is, we run a website or blog or combine.

Plug-ins allow you to add details like social networking buttons, contact form ... or add serious functionality like the ability to have versions of the site in different languages, forum, statistics.

The code is open, if you are familiar with web programming, you can write the plug-in yourself or take it as a basis ready and correct for yourself.