World's most comprehensive, powerful, process-based PDF editor
Open source PDF editor
X-Plane plugin that displays a tablet to aid VR usage
Asciidoctor PDF: A native PDF converter for AsciiDoc
Hackable CLI tool for converting Markdown files to PDF using Node.js
Devuan GNU+Linux 5.0.1 Daedalus based distribution (systemd-free)
PDF Combiner is a user-friendly, GUI-based tool built in
Online service for PDF conversion (to PDF)
HealthApp (dicom viewer server web app ) & office_word
Fast rolling Linux distribution based on Debian with Cinnamon desktop
Convert HTML to PDF in .NET with C# using EVO HTML to PDF for .NET
AlphaCentauri is a completely free Office tools application.
Mac OSX style and feel on the latest Cinnamon Desktop
Office System is a open source office program!