Pleroma
Federated microblogging server, Mastodon, GNU social, & ActivityPub compatible.
Plone
Powerful open-source CMS system.
PmWiki
Wiki-based system for collaborative creation and maintenance of websites.
Postfix
Fast, easy to administer, and secure Sendmail replacement.
Privoxy
Non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data a…
ProjeQtOr
Complete, mature, multi-user project management system with extensive functionality for all phases of a pro…
Prosody IM
Feature-rich and easy to configure XMPP server.
Psono
Password manager for companies.
QST
Online assessment software.
Readeck
Save the precious readable content of web pages you like and want to keep forever.
Redmine
Flexible project management web application.
Surfer
Simple static file server with webui to manage files.
ResourceSpace
Simple, fast, and free way to organise your digital assets.
RhodeCode
Unify and simplify repository management for Git, Subversion, and Mercurial.
Roundup Issue Tracker
Simple-to-use and -install issue tracking system with command-line, web, REST, XML-RPC, and e-mail interfaces.
rs-short
Lightweight link shortener written in Rust, with features such as caching, spambot protection and phishing…
Rukovoditel
Configurable open source project management, web-based application.
Rygel
UPnP AV MediaServer that allows you to easily share audio, video, and pictures.
Salut à Toi
Multipurpose, multi frontend, libre and decentralized communication tool.
Samba
Samba is the standard Windows interoperability suite of programs for Linux and Unix.
SANE Network Scanning
Allow remote clients to access image acquisition devices (scanners) available on the local host.
Schleuder
GPG-enabled mailing list manager with resending-capabilities.
SeedDMS
Document Management System with workflows, access rights, fulltext search, and more.
Sendmail
Message transfer agent (MTA).