Free web software for signing PDFs and also organize pages
World's most comprehensive, powerful, process-based PDF editor
open source Java library for creating and editing PDF files
Open source PDF editor
Web app for browsing, reading and downloading eBooks stored in Calibre
LilyPond sheet music text editor
An open source and free music notation software
Image Toolbox is an powerful picture editor, which can crop
ImageMagick 7
Collabora Online is a collaborative online office suite
An extensible Markdown Editor, Viewer and Weblog Publisher for Windows
Fidus Writer is an online collaborative editor for academics
Pure go library for creating and processing Office Word documents
A painless self-hosted Git service
Create markdown-based reveal.js presentations in Obsidian
Create, Edit, Delete, Organize , Convert, Export, Secure & Sign.
A PDF Reader and Note-taker for OS X
Read, write and edit metadata
EasyABC is an open source ABC editor
A simple and elegant markdown editor
The iSphere Project for and RDi 9.5.1.3+
ITTT is a Free tool designed to Scan and extract Text from Images.
A GNU/Linux operating system accessible for visually impaired.