Open Source OCR Engine
A pdf component for react-native
Open source PDF editor
X-Plane plugin that displays a tablet to aid VR usage
A handwriting notetaking software with PDF annotation support
The Ray Tracing in One Weekend series of books
A fast DVI, EPS, and PDF to SVG converter
Node canvas is a Cairo backed Canvas implementation for NodeJS
Prepress preparing tool and PDF editor
An open source and free music notation software
a graphical user interface for the PDF Toolkit (PDFtk)
Cross-platform Open-source 2D CAD
Powerful desktop publishing software
GPS log file viewer and analyzer
Windows eml and mbox viewer.
PDF transformation/manipulation program + library
A feature-rich environment for writing LaTeX documents on Windows
A batch image converter and resizer
An integrated writing environment for creating LaTeX documents
converts PostScript or PDF files to other vector graphics formats
Qt based cross-platform screenshot tool with annotations
Qt based Veroboard, Perfboard, and PCB layout and routing application
Scriptable data terminal which supports several interfaces.
Gerber to PDF converter