Google Advanced Search allows you to refine their search queries with more specific criteria, leading to more precise results than a standard Google search. It offers a variety of filters to narrow down search results based on language, region, date, file type, and more. 

Google Scholar is a specialized search engine that focuses on scholarly literature, allowing users to find academic articles, theses, books, abstracts, and court opinions from various sources. It differs from general web search engines by concentrating on academic and scientific information. 

Citation Machine or Cite This For Me, are tools that helps you create citations and bibliographies for your research papers. It automates the process of formatting citations in various styles (like APA, MLA, Chicago, etc.) based on the information you provide about your sources.