Free Software for Engineering Reports and Theses — What Really Replaces Word, EndNote and Acrobat, and What Does Not
An engineering report, calculation note or thesis is usually written in Word, with a paid equation editor, EndNote or Mendeley for references, and Adobe Acrobat for merging, marking up and commenting on PDFs. That is a stack of licences and subscriptions for a single document.
The real question for an engineer or student: can you write, cite and submit the same document with free tools without losing time or quality? Here are nine free, open-source tools grouped by job, with an honest note on where each one stops.
Writing with equations
1. LyX
A LaTeX-based document processor with a graphical interface: you type equations almost as in a normal editor, and numbering, cross-references, the table of contents and the bibliography are handled for you. It suits a thesis or a long report with dozens of equations, and it supports Hebrew.
What is missing: you need a TeX distribution installed, Word export is limited, and working with a reviewer who insists on Word comments and tracked changes is awkward.
LyX
LyX team
A graphical LaTeX-based document editor — theses, papers and technical reports with equations.
Get it from the vendor2. Typst
A modern typesetting system as an alternative to LaTeX: simpler syntax, near-instant compiling and clear error messages. It is good for reports and specifications that reuse the same template.
What is missing: you write markup, not in a visual editor, there is no Word export, and few universities or journals provide a Typst template yet. The online editor typst.app is a separate service with a paid plan; the local tool is completely free.
Typst
Typst
Modern typesetting for technical reports and equations — simpler syntax than LaTeX and instant compiling.
Get it from the vendor3. GNU TeXmacs
A scientific editor where you see the final result while you write, with fast equation entry. Its unique strength: you can open a Maxima, Octave or Python session inside the document, so the calculation and the report live in the same file.
What is missing: a small community, its own file format, and exchanging files with Word users is not natural.
GNU TeXmacs
GNU TeXmacs project
A WYSIWYG scientific document editor with maths, and direct sessions in Maxima, Octave and Python.
Get it from the vendor4. LibreOffice Writer
The direct replacement for Word: it opens and saves docx, has a built-in formula editor, styles, a table of contents and PDF export, and it supports Hebrew. It is the easiest switch when a client or supervisor expects a Word file.
What is missing: the formula editor uses its own markup language and is less fluid than Word’s, and complex docx files can shift in layout between the two programs.
LibreOffice
The Document Foundation
A full office suite — documents, spreadsheets, presentations and drawings, compatible with Office files.
Get it from the vendorReports generated from code and data
5. Quarto
You write in Markdown, add Python, R or Julia chunks, and tables, plots and numbers flow into the document automatically. It exports to Word, PDF, HTML and slides, which makes it ideal for a test report or calculation note that repeats with new data.
What is missing: it needs basic coding skills, PDF output runs through LaTeX or Typst, so a polished PDF template takes extra setup, and it is not an ordinary WYSIWYG editor.
Quarto
Posit
Technical reports from code and data — Python, R or Julia into Word, PDF, HTML and slides.
Get it from the vendorReferences
6. Zotero
It saves papers, books and standards from the browser in one click, organises them in collections, and lets you read and annotate PDFs. The Word and LibreOffice plugin inserts citations and a bibliography in any style.
What is missing: cloud storage for syncing files beyond 300 MB is a paid service, but you do not need it to use the program.
Zotero
Corporation for Digital Scholarship
Reference and bibliography manager — save papers and standards, annotate PDFs and cite automatically in Word.
Get it from the vendorPDF handling and markup
7. Xournal++
Handwriting and markup on PDFs with a stylus or mouse: review comments on drawings and reports, worked exercises and lecture notes, with layers and a LaTeX equation tool.
What is missing: it does not edit the PDF’s own text, and the equation tool needs a LaTeX installation.
Xournal++
Xournal++ team
Handwriting and PDF annotation with a stylus — markups on drawings, lecture notes and problem solving.
Get it from the vendor8. PDFsam Basic
Merge, split, rotate and extract pages — exactly what you need to assemble a drawing set or a submission package, without uploading files to a website.
What is missing: no content editing, forms or OCR. Choose the free Basic edition; the company also sells other, paid products.
PDFsam Basic
Sober Lemur
Split, merge, rotate and extract PDF pages — for drawing sets, specifications and submissions.
Get it from the vendor9. SumatraPDF
A tiny, fast PDF reader for Windows that opens heavy drawings and specifications instantly, with a portable version that needs no installation.
What is missing: Windows only, and it is built for reading and printing, not editing.
SumatraPDF
Krzysztof Kowalczyk
A tiny, very fast PDF reader for Windows — opens heavy drawings instantly, and reads ePub and DjVu too.
Get it from the vendorSo can you drop Word, EndNote and Acrobat?
EndNote and most everyday Acrobat tasks — yes. Zotero covers reference management, and PDFsam Basic with Xournal++ covers merging, splitting and markup. Word is harder to drop when a client requires docx with tracked changes; there, LibreOffice Writer is the safe answer.
A student writing a thesis: LyX or Typst with Zotero. An engineer issuing recurring calculation notes: Quarto. An office that exchanges Word files with clients: LibreOffice Writer, Zotero and PDFsam Basic.
For more tools see the productivity software and calculation tools categories.