(Updated 30.3.2018, just my random memo/bookmark page for plugins and few highlights)

You can find all the Adobe Analytics plugins in here: https://marketing.adobe.com/resources/help/en_US/sc/implement/impl_plugins.html

Newest on is s.hitGovernor. The s.hitGovernor plugin tracks the total number of Analytics image requests sent during a predefined rolling time frame, and can perform additional logic as required if that total exceeds a certain threshold. https://marketing.adobe.com/resources/help/en_US/sc/implement/hitgovernor.html