In SyDES modules are divided into 3 types:
Information modules - always available in the main menu and allow you to work with different data, whether it's reviews, gallery, shop or calculators.
Constructors - modules that provide a visual interface for creating various widgets like sliders, banners, menus or form.
Tools - usually do not have their own tables, do not need to install and operate any one-time work like import/export or check the status of the system. But it is also possible to include here and modules that control the properties and settings of other modules, such as redirects editor and batch editor.