Apex
Apex module allows you to author and execute an anonymous Apex script. It also helps you save commonly used Apex scripts as Saved Scripts and execute them later, shows the history of execution, set Debug Log levels, easily view the results etc.,
See the video guide below to know more about how to execute.
Apex Looper
Apex Looper is an administrative tool that helps you loop an Apex Script for a fixed number of times or based on the input with delay between the run. This can be leveraged to take care of many administrative tasks. Since each loop iteration is new transaction, you can take care of tasks that need new Governer limits for each iteration.