# Special Plugin-Types

The main plugin types are covered by [](../plugins.rst). 
This document describes groups of plugins that implement a common interface and can be identified by the tags they use.


| Interface                 | Tags                                 | Description                                                                                |
|:--------------------------|:-------------------------------------|:-------------------------------------------------------------------------------------------|
| [](circuit-executor.md)   | `circuit-executor`, [`qc-simulator`] | A plugin that is capable of executing quantum circuits.                                    |
| [](minimizer.md)          | `minimizer`, [`gradient`]            | A plugin that can minimize objective functions.                                            |
| [](objective-function.md) | `objective-function`, [`gradient`]   | A plugin that computes the value of an objective function used in an optimization process. |


:::{toctree}
:glob:

*
optimization-plugins-interaction/index
:::