Cross-platform command-line tool for creation of PDF documents from scans/photos of pages in JPEG (.jpg) format and the lightest weight ANSI C library to put multiple JPEG files into one PDF file.
You can add handwritten comments to PDF scans (over original images) with xournal: http://xournal.sourceforge.net/
It supports graphics tablets and saves comments to PDFs as vector data.
C library for robot creators using certain AVR microcontrollers with support for 3rd party hardware boards for various sensors and motor controllers. Comprehensive PDF manual included in the download.
Version 2 code stream - requires that projects are created using Project Designer from my web site. If your board isn't listed in Project Designer then look at Board Designer on my web-site to create your own custom board - or if its a commercial board then let me know and, with permission, I will add your design to the release.
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Reporting engine library written in C. Create one XML file and generate PDF, HTML, TXT, and CSV reports based on queries. Has support for MySQL, PostgreSQL, ODBC. Bindings for PHP, Java, Python.