# Core Packages

- [Auth](/adaptcms/core-packages/auth.md)
- [Base](/adaptcms/core-packages/base.md): The base package is used as a repository of neutral functionality that may be used by many other packages.
- [Fields](/adaptcms/core-packages/fields.md)
- [Modules](/adaptcms/core-packages/modules.md)
- [Pages](/adaptcms/core-packages/pages.md)
- [Plugins](/adaptcms/core-packages/plugins.md)
- [Site Types](/adaptcms/core-packages/site-types.md)