This plugin is for sections that have a "dragSortOrder" field defined.
This plugin adds a new "create record here" link below "modify" and "erase" on the record list page. This link allows you to create a new record with a dragSortOrder value pre-set to be sorted just below the current record.
This can be very helpful when you have hundreds of records where "drag sorting" a record from the bottom of a long list can take some time.
Note: This plugin is also a good example for plugin authors who want to add their own action links.