Software

Fast and lightweight DNS proxy as ad-blocker for local network with many features (alternative to Pi-hole). ([Source Code](https://github.com/0xERR0R/blocky))

Local ad blocker. Like Pi-hole but local and using your operating system. ([Source Code](https://github.com/tanrax/maza-ad-blocking))

Blackhole for Internet advertisements with a GUI for management and monitoring. ([Source Code](https://github.com/pi-hole/pi-hole))

Authoritative/recursive DNS server with ad blocking functionality. ([Source Code](https://github.com/TechnitiumSoftware/DnsServer))

Auto-tagging document organizer and archive. ([Source Code](https://github.com/eikek/docspell))

Digital document signing platform (alternative to DocuSign). ([Source Code](https://github.com/documenso/documenso))

Create, fill, and sign digital documents (alternative to DocuSign). ([Demo](https://demo.docuseal.tech/), [Source Code](https://github.com/docusealco/docuseal))

Developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more. ([Source Code](https://github.com/gotenberg/gotenberg))

Organize PDF papers and office documents. It provides a lot of extra features for students and research groups both in industry and academia. ([Demo](https://eu1.i-librarian.net/demo), [Source Code](https://github.com/mkucej/i-librarian-free))

Electronic document management system for your documents with preview generation, OCR, and automatic categorization among other features. ([Source Code](https://gitlab.com/mayan-edms/mayan-edms))

Scan, index, and archive all of your paper documents with an improved interface (fork of Paperless). ([Demo](https://demo.paperless-ngx.com/), [Source Code](https://github.com/paperless-ngx/paperless-ngx))

Document management system focused on scanned documents (electronic archives). Features file browsing in similar way to dropbox/google drive. OCR, full text search, text overlay/selection. ([Source Code](https://github.com/papermerge/papermerge-core))

Minimalist document storage, management and archiving platform designed to be simple to use and accessible to everyone. ([Demo](https://demo.papra.app/), [Source Code](https://github.com/papra-hq/papra/))

PDF manager, viewer and editor offering a seamless user experience on multiple devices. It's designed to be minimal, fast, and easy to set up using Docker. ([Demo](https://demo.pdfding.com), [Source Code](https://codeberg.org/mrmn/PdfDing))

Document Management System with workflows, access rights, fulltext search, and more. ([Demo](https://www.seeddms.org/about/), [Source Code](https://sourceforge.net/p/seeddms/code/ci/master/tree/))

Manga/comic/light novel media server with clients for Windows, Linux, macOS and Android. ([Source Code](https://github.com/Atsumeru-xyz/Atsumeru), [Clients](https://atsumeru.xyz/guides/#how-does-it-work))

E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients. ([Demo](https://calibre-ebook.com/demo), [Source Code](https://github.com/kovidgoyal/calibre))

Build and manage a comic book library. Download, rename, move and convert issues of the volume to your liking. ([Source Code](https://github.com/Casvt/Kapowarr))

Cross-platform e-book/manga/comic/pdf server and web reader with user management, ratings and reviews, and metadata support. ([Demo](https://www.kavitareader.com/#demo), [Source Code](https://github.com/Kareadita/Kavita))

Media server for comics/mangas/BDs with API and OPDS support, a modern web interface for exploring your libraries, as well as a web reader. ([Source Code](https://github.com/gotson/komga))

A fast, free and open source comics, manga and digital book server with OPDS support. ([Source Code](https://github.com/stumpapp/stump))

Turnkey repository application providing durable access to digital resources. ([Source Code](https://github.com/DSpace/DSpace))

Digital document management system with a flexible metadata and workflow model primarily aimed at academic institutions. ([Demo](http://tryme.demo.eprints-hosting.org/), [Source Code](https://github.com/eprints/eprints3.4))

Robust and modular repository system for the management and dissemination of digital content especially suited for digital libraries and archives, both for access and preservation. ([Source Code](https://github.com/fcrepo/fcrepo))