Content management systems are software programs that are used to develop, manage and publish content that goes on a custom made website or a blog. There are several different styles, companies and versions of the same programs which all have a single purpose and usage: to create, publish, and maintain the content placed on the web. No matter what the preferred program in use there are different versions available. Some offer a free version while others offer only paid versions. Both have their own pros and cons but may be limited in what they can do. Content management systems also use different program languages as well as different databases. Basically speaking, each program is unique in the way it manages content. Here are some examples.