The Locator bar is a fast, always ready, generic and pluggable search facility in the Left Bottom corner of QGIS.
Currently it is able to search for algorithms, actions and layer names, but also to select a feature in current active layer by typing an attribute value.
It is 'easy' extendable, so everybody can create a QgsLocatorFilter for his/her national geocoding service or other search online or database search facility.
This feature was developed by Nyall Dawson