Flameshot — The Complete Guide: Screenshots With In-Place Markup on Any Operating System
Flameshot lets you mark up right on the captured area: arrows, text, blur and numbered steps. Great for commenting on drawings, on Windows, macOS and Linux.
Guides and Articles
Greenshot — The Complete Guide: Screenshots With Arrows and Highlights on Windows
Greenshot is a lightweight Windows screenshot tool with a built-in editor: arrows, shapes, highlights and blurring, then save, print, email or send to Office.
PlantUML — The Complete Guide: Diagrams From Text, Kept Under Version Control
PlantUML draws diagrams from plain text: sequence, state, component, Gantt and more. Each diagram is a text file you can keep in Git and embed in your docs.
Trilium Notes — The Complete Guide: A Hierarchical Knowledge Base for Large Engineering Notebooks
Trilium Notes is a tree-shaped knowledge base: text, code, canvas, diagrams and sheets, with search, history, encryption and self-hosted sync between PCs.
Zettlr — The Complete Guide: A Markdown Editor for Theses, Papers and Long Reports
Zettlr is a Markdown editor for technical writing and theses: Zotero citations, LaTeX equations and Mermaid charts, with export to Word and PDF via Pandoc.
Pandoc — The Complete Guide: Write a Report Once, Export to Word, PDF and HTML
Pandoc converts documents between dozens of formats: Markdown, Word, LaTeX, HTML, PDF. Write reports in plain text, publish as Word in your office template.
Text Grab — The Complete Guide: Windows Screen OCR for Text and Tables
Text Grab copies text and tables from anywhere on a Windows screen, all locally. What the free GitHub build gives you and what the paid Store edition adds.
NormCap — The Complete Guide: A Screenshot Tool That Captures Text, Not Images
NormCap copies the text in any marked screen area to the clipboard. Grab a value from a locked PDF, an image or a program window, all processed locally.
Tesseract OCR — The Complete Guide: The Open OCR Engine for Turning Scans Into Text
Tesseract is the open OCR engine behind many tools: it reads text in images in 100+ languages and outputs text, searchable PDF and more. How engineers use it.
PDF4QT — The Complete Guide: An Open PDF Editor With Annotations, Signing and Version Comparison
PDF4QT is an open PDF suite: a viewer with annotations and signature checks, page organiser, version comparison, redaction and signing. A free PDF editor.
diff-pdf — The Complete Guide: Seeing What Changed Between Two Drawing Revisions
diff-pdf compares two PDF files and highlights the differences, so you see at once what changed between revisions B and C of a drawing. Viewer, marked PDF, CLI.
Okular — The Complete Guide: Viewing, Annotating and Verifying Digital Signatures in PDFs
Okular is KDE’s document viewer: highlights and notes on PDFs, plus checking that a digital signature is valid and the file was not changed after signing.