Tool shelf is a small productivity add-on for Blender to collect all commonly used tools and scripts in one easy to access panel. This is most helpful for users coming from other DCC packages where such tool spaces are part of the workflow.
It also greatly reduces the need to create separate custom add-ons and operators for alls sorts of workflow helper scripts.
All contained commands and buttons can be organized in groups, edited, sorted and having their code viewed for inspection.
The complete configuration is saved as a json file and can easily be shared across other workstations or artists.