Tools to retrieve data from Google Scholar for citation analysis:
Scholarometer is "a social platform to facilitate citation analysis. You provide author field annotations, and our tool uses this crowdsourced data to evaluate the impact of an author's publications. Our impact metric can be compared across fields. Install the browser extension to use Scholarometer" by Indiana University.
Publish or Perish is a software program that retrieves and analyzes academic citations from external data sources for citation data, then it analyzes and presents a range of citation metrics, including the number of papers, total citations and the h-index.