tracker-gui 1.6.1-2ubuntu1 (amd64 binary) in ubuntu xenial

 Included in this package:
  * tracker-needle: standard search tool
  * tracker-preferences: preferences editor
  * nautilus-extension: nautilus extension for tag editing
 .
 Tracker is an advanced framework for first class objects with associated
 metadata and tags. It provides a one stop solution for all metadata, tags,
 shared object databases, search tools and indexing.