🗄️ DatabasesUS
MySQL Community Edition
Open-source relational database distributed as MySQL Community Edition under GPL. Oracle documents Community Edition as open source, with source code available in the mysql/mysql-server repository.
open-sourcedatabaserelational-database
🛍️ App StoresDE
Neo Store
Modern F-Droid client with a feature-rich UI. Fork of Foxy-Droid, offering fast repository sync, built-in repositories, and extensive filtering options.
open-sourceapp-storeandroid
🔒 VPNDE
NetBird
Open source Zero Trust Network Access (ZTNA) platform combining WireGuard-based overlay networks with centralized access control. Provides SSO, MFA, and granular policies with self-hosting option. Developed by NetBird GmbH in Berlin with operations in the Netherlands.
open-sourcevpnztna
☁️ Cloud StorageDE
OpenCloud
German open-source file management and collaboration platform from Heinlein Gruppe (Berlin). Fork of ownCloud Infinite Scale, offering secure file storage, sharing, and real-time collaboration with GDPR compliance. Available as self-hosted solution or via partner SaaS.
open-sourcecloud-storagefile-sync
🎞️ Video EditingOSS
OpenCut
OpenCut is a free, open-source video editor.
open-sourceprivacyself-hosted
🎬 Video HostingFR
PeerTube
Decentralized video hosting platform developed by French non-profit Framasoft. PeerTube federates video and live-streaming across independently run instances via ActivityPub, freeing creators from ads, tracking, and algorithmic manipulation.
open-sourcevideo-hostinghosting
☁️ Cloud StorageGB
Rclone
Mature, open-source command-line tool for syncing files to and from over 70 cloud storage providers. Often called "rsync for cloud storage", rclone enables users to manage data across multiple providers with encryption, compression, and mounting capabilities. Fully self-hostable as users control which cloud providers they connect to.
open-sourcecloud-storagesync
💬 MessagingGB
SimpleX
Decentralized, open-source, end-to-end encrypted messenger without unique user identifiers. Uses double-ratchet E2E encryption and operates without any user IDs, offering strong metadata privacy.
open-sourcemessaginge2ee
💬 MessagingUS
XMPP
Open decentralized messaging protocol (formerly Jabber) maintained by the XMPP Standards Foundation. Federated architecture allows anyone to run their own server, enabling true data sovereignty. Supports end-to-end encryption via OMEMO, OTR, and OpenPGP. Multiple clients available across all platforms.
open-sourcemessagingfederated
👥 Social MediaUS
diaspora
Pioneering decentralized social network where users own their data. diaspora* distributes content across independently run pods with no central authority, offering aspects-based sharing for fine-grained privacy control.
open-sourcesocial-mediaprivacy
🛍️ App StoresUS
AltStore
AltStore is an alternative iOS app marketplace and sideloading platform that lets users install apps outside Apple’s App Store. It offers AltStore PAL for official alternative marketplace distribution where supported and AltStore Classic with AltServer for local sideloading and app refresh, plus source-based app distribution aimed at power users and indie developers.
open-sourceiossideloading
🗣️ TranslationUS
Argos Translate
Argos Translate is an open-source offline neural machine translation library for Python that also supports command-line and graphical interfaces.
offlineself-hosted
📷 Photo ManagementFR
Aves Gallery
Open-source gallery and metadata explorer app for Android, built with Flutter. Aves handles various image and video formats including JPEGs, MP4s, multi-page TIFFs, SVGs, and more. Features include motion photo detection, panorama support, 360-degree video handling, and geoTIFF support. Developed by independent French developer Thibault Deckers.
open-sourcegalleryandroid
💬 MessagingGB
Element (Matrix)
Flagship client for the Matrix protocol, an open standard for decentralized, end-to-end encrypted communication. Element offers real-time messaging with rooms, spaces (similar to Discord servers), voice and video calls, and bridges to other platforms. The federated architecture lets users pick any homeserver or self-host while communicating across the entire Matrix network. Other popular clients include FluffyChat, Nheko, and Cinny.
open-sourcemessagingmatrix
📲 2FA AuthenticatorsUS
Ente Auth
Open source 2FA authenticator with end-to-end encrypted cloud backups, developed by Ente Technologies Inc. (USA). Available on Android, iOS, F-Droid, Web, Desktop, MacOS and Linux. Free and open source under AGPL-3.0 license with external security audits.
open-source2faauthenticator
🤖 Large Language ModelsAT
HilbertRaum
HilbertRaum is an open-source, offline AI workspace for local language-model chat and cited question answering over private documents.
offline-ailocal-llmprivacy
☁️ Cloud StorageUS
Immich
Open-source self-hosted photo and video management platform. Immich allows users to store, organize, and share their media collections with privacy controls and AI-powered features like facial recognition and object detection.
open-sourcemedia-managementphoto-management
📄 Office SuiteDE
Nextcloud Docs
Self-hosted collaborative document editing built from Nextcloud Text plus Nextcloud Office (Collabora integration). It offers strong data-sovereignty and open-source governance, but reliable operations require disciplined patching, hardening, and careful handling of optional external AI/provider integrations.
open-sourceoffice-suitedocuments
👥 Social MediaOSS
Nostr
Decentralized social media protocol using cryptographic keys for identity and relays for message distribution. Founded by pseudonymous developer fiatjaf in 2020, Nostr is open-source (public domain) and censorship-resistant. Multiple independent clients exist (Damus, Amethyst, Coracle).
open-sourcesocial-mediadecentralized
🗺️ Maps & NavigationGB
OpenStreetMap
Community-built open map data commons stewarded by the OpenStreetMap Foundation. Data is free under ODbL and highly portable for self-hosting, but OSMF-operated tile and Nominatim endpoints are best-effort community services with usage limits and no enterprise SLA guarantees.
open-sourceopen-datacommunity-driven
☁️ Cloud StorageOSS
Paperless-ngx
Open-source document management system that scans, indexes, and archives all your paper documents. OCR support via Tesseract, full-text search, multi-user permissions, and webhook integrations. Self-hostable for complete data sovereignty.
open-sourcecloud-storagedocument-management
☁️ Cloud StorageFR
Papra
Open-source, self-hostable document archiving. You can use Papra as freemium on servers hosted in Europe or host it yourself for free.
open-sourcedockerself-hosted
👥 Social MediaDE
Pastely
Pastely is a platform for link-in-bio pages, short links, and digital business cards.
gdprlink-in-bioshort-links
🎥 Meeting SoftwareES
PlugNMeet
PlugNMeet is an open-source, self-hostable WebRTC conferencing platform for video meetings, webinars, online classes, and embedded collaboration. It offers browser-based HD audio/video, screen sharing, public and private chat, recording, RTMP broadcasting, breakout rooms, polls, shared whiteboard/notepad, E2EE, captions, translation, APIs, SDKs, and CMS/LMS integrations.
open-sourceself-hostedwebrtc