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  2. Best Free PDF Editors of 2023 - AOL

    www.aol.com/best-free-pdf-editors-2023-204004606...

    While PDFs provide greater security than Word documents, Google Docs or spreadsheets, it is possible to edit a PDF. You just need the right software or app. Best Free PDF Editors of 2023

  3. Google Scholar - Wikipedia

    en.wikipedia.org/wiki/Google_Scholar

    Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...

  4. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    A commercial PDF editor, markup and collaboration product aimed at engineering and architectural markets. Foxit Reader: Freeware: Highlight text, draw lines, measure distances of PDF documents. Foxit PDF Editor Suite: Free trial: Integrated PDF Editing and eSign anywhere. Optionally, ChatGPT+ gDoc Fusion: Proprietary/Shareware

  5. PDFedit - Wikipedia

    en.wikipedia.org/wiki/PDFedit

    PDFedit is a free PDF editor for Unix-like operating systems (including Cygwin on top of Windows). It does not support editing protected or encrypted PDF files or word processor-style text manipulation, however. [1] PDFedit GUI is based on the Qt 3 toolkit and scripting engine , so every operation is scriptable.

  6. ResearchGate - Wikipedia

    en.wikipedia.org/wiki/ResearchGate

    ResearchGate's competitors include Academia.edu, Google Scholar, and Mendeley, [4] as well as new competitors that emerged in the last decade like Semantic Scholar. In 2016, Academia.edu reportedly had more registered users (about 34 million versus 11 million [ 25 ] ) and higher web traffic, but ResearchGate was substantially larger in terms of ...

  7. List of academic databases and search engines - Wikipedia

    en.wikipedia.org/wiki/List_of_academic_databases...

    FREE Resources: 3 articles every 2 weeks (Register and Read Program, archived journals). Also, early journals (prior to 1923 in US, 1870 elsewhere) free, no registry necessary. Free and Subscription JSTOR [88] Jurn: Multidisciplinary Jurn is a free-to-use online search tool for finding and downloading free full-text scholarly works.