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: PDFsam is an open-source PDF editing software that allows users to merge, split, rotate, mix and extract pages from PDF files. It has a graphical user interface and offers basic PDF manipulation functionalities for free.
Type: software
Pricing: Open Source