Sites like flarum.org

Packagist, the main public repository of PHP packages installable with the Composer dependency manager, with package search, API and feeds

PufferPanel, an open source web panel for installing and managing game servers such as Minecraft and Source dedicated servers

Leantime, an open source project management software for teams, with a mobile app in beta

Open QuarterMaster is an open source inventory management software project with a demo instance and merchandise shop

FreshRSS, a free self-hosted RSS and Atom feed aggregator with a blog and project contact pages

Rocket.Chat, an open source team chat and collaboration platform for secure, self-hosted government and enterprise communications

Open-source software for streaming your own music library from a self-hosted server, with apps and downloads

Linkwarden, an open source bookmark manager for saving, annotating and preserving web pages, with apps and a browser extension

A self-hosted, open-source bookmark archive tool called LinkAce, built and documented by its developer, for saving and organizing web links

Personal blog and project site by Leo Spratt on self-hosting, tech tools, photography and his music as Spectral Nova

Komga, an open-source media server for digital comic and manga libraries, with documentation and blog posts by developer gotson

Kavita, a self-hosted digital library server for EPUB, PDF, comic and manga reading with built-in readers

Lakka, an open source Linux distribution that turns a small computer into a retrogaming emulation console, with its project showcase site

Syncthing, an open-source continuous file synchronisation tool, with project donation and foundation information pages

AdonisJS, a batteries-included TypeScript web framework for Node.js, with a blog and team pages by its creator Harminder Virk

Ogre3D, an open source C++ 3D graphics rendering engine with news, community forums, a legacy wiki and support

Wiki.js, an open source wiki software project for writing and publishing documentation, with versions 2.0 and 3.0

Kresus, a free self-hosted personal finance manager that syncs bank transactions, categorizes them and builds budgets, with documentation and a demo

Pterodactyl is a free, open-source web panel for self-hosting and managing game servers in Docker containers

Joplin, an open source note-taking app with multimedia notes, web clipping and end-to-end encrypted sync, developed by Laurent

Beszel, a lightweight self-hosted server monitoring tool with Docker stats, historical data, alerts, and GPU monitoring

DockSTARTer is a tool and documentation site by its developers for quickly setting up Docker and self-hosted applications on Linux systems

Woodpecker CI, a continuous integration server forked from Drone 0.8, with an awesome-list of related tools and tutorials

CryptPad, an open-source end-to-end encrypted office suite for real-time collaborative documents, spreadsheets, slides and whiteboards, developed by XWiki SAS

Stump is an open source, self-hostable media server for ebooks, comic books and manga, with web, desktop and mobile apps

Nextcloud, an open source self-hosted platform for file sharing and online collaboration as a Microsoft 365 alternative

Peergos is an open-source encrypted cloud storage service and drive, with its own client and server software

A French-language project page for Armbian, an open-source Debian and Ubuntu Linux distribution for ARM single-board computers

Typesense, an open source in-memory search engine and alternative to Algolia and Elasticsearch, with documentation and Docker images

Alf.io, an open source event ticketing and attendance management system for organizers, with documentation and community pages

PinePods is a self-hosted podcast management app built with Rust, with a blog covering its development

SnapOtter is a self-hosted file processing tool for private image and document workflows, with pages in Spanish, Hindi and Indonesian

Vikunja, an open-source self-hostable task manager with lists, Kanban and Gantt views, with documentation and a Pro tier

Cheogram is a messaging service that connects telephone SMS and open chat networks such as XMPP and Matrix into one app

Loops, a federated open-source short-video sharing platform and app for creators and communities on the social web

Open source self-hosted live streaming server software called Owncast, with built-in chat, notifications and fediverse support

Lemmy is a free, open-source, decentralised discussion platform with threaded comments, run by its communities and self-hosted servers

Conduit: a simple, fast chat server software project for hosting your own Matrix messaging server

Spliit, a free open source web and iPhone app for splitting shared expenses and group balances among friends and family