CMS Made Simple is an open source (GPL) package, built using PHP that provides website developers with a simple, easy to use utility to allow building small-ish (dozens to hundreds of pages), semi-static websites. Typically our tool is used for corporate websites, or the website promoting a team or organization, etc. This is where we shine. There are other content management packages that specialize in building portals, or blogs, or article based content, etc. CMS Made Simple can do much of this, but it is not our area of focus.
The Core package provides the ability to manage news articles, search functionality a contact form, a WYSIWYG editor (for your customers or editors) and numerous other built in functions. Additionally, there are hundreds of third party add-on tools that are quickly and easily installable to allow building websites with many different capabilities.