Description: Google Scholar is a free online academic database that indexes scholarly literature across disciplines and sources. It allows users to search for peer-reviewed papers, theses, books, abstracts, and court opinions.
Type: software
Description: SumatraPDF is a free and open-source PDF, eBook, XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. It is lightweight, customizable, and supports many advanced PDF features.
Type: software
Pricing: Open Source