🔑 Identity & Access ManagementOSS
Authelia
Open-source authentication and authorization server providing two-factor authentication (2FA) and single sign-on (SSO) for web applications via a web portal. OpenID Connect 1.0 Certified with support for OAuth2/OIDC, LDAP integrations, TOTP, WebAuthn/Passkeys, and push notifications. Designed as a companion for reverse proxies like nginx, Traefik, and Caddy.
open-sourceiamsso
🔐 Password ManagerUS
Bitwarden
US-based but fully open-source password manager offering end-to-end encrypted storage for passwords, passkeys, credit cards, and sensitive notes across every platform. With a generous free tier, self-hosting support, and full third-party security audits, Bitwarden is the leading transparent alternative to proprietary password vaults. Note: Bitwarden is headquartered in the US but included here for its open-source nature and self-hosting capability.
open-sourcepassword-managerencryption
🎨 Design & GraphicsNL
Blender
Blender is a free and open-source 3D creation suite for artists, studios, designers, and technical teams. It provides an end-to-end workflow for modeling, sculpting, animation, simulation, rendering, compositing, motion tracking, and video editing, with extensibility through Python and a large plugin ecosystem. It runs locally on user hardware without requiring vendor cloud infrastructure.
open-source3d-modelinganimation
🗄️ DatabasesNL
DuckDB
Open-source in-process analytical SQL database for OLAP workloads. The DuckDB Foundation states the project is MIT-licensed with no enterprise version and is incorporated in the Netherlands.
open-sourcedatabaseanalytical-database
🌍 DNS ServicesDE
FFMUC DNS
A free public DNS resolver by Freifunk München with plain DNS, DNS-over-HTTPS, DNS-over-TLS, DNS-over-QUIC, and DNSSEC support.
privacydnsdnssec
🧑💻 Version Control ServicesDE
Forgejo
Self-hosted lightweight software forge developed by the community under the umbrella of Codeberg e.V., a democratic non-profit organization based in Berlin, Germany. A hard fork of Gitea focused on privacy, federation, and community ownership. 100% Free Software under GPLv3+ license.
open-sourceversion-controldevops
💻 Desktop Operating SystemsUS
FreeBSD
Free and open-source Unix-like operating system descended from Berkeley Software Distribution (BSD). Developed since 1993, FreeBSD offers advanced networking, security, and storage features making it popular for servers, embedded systems, and network appliances. Used by major companies including Netflix, WhatsApp, and FlightAware. Cross-platform support includes x86-64, ARM64, RISC-V, and PowerPC.
open-sourceoperating-systemserver
🎨 Design & GraphicsUS
GIMP
GNU Image Manipulation Program - a free and open-source raster graphics editor used for image retouching, editing, free-hand drawing, and converting between image formats. Cross-platform (Linux, macOS, Windows, FreeBSD, OpenBSD). Part of the GNU Project, actively maintained with regular releases.
open-sourcegraphics-editorphoto-editing
💳 PaymentsLU
GNU Taler
GNU Taler is a privacy-preserving open-source payment system for end users, merchants, and payment operators. It combines browser and mobile wallets with merchant backend, exchange, and bank-integration components so communities, companies, or public operators can run online, point-of-sale, and micropayment flows with fast confirmation, low fraud exposure, and merchant accountability.
open-sourceprivacy-focuseddigital-cash
💰 Personal FinanceCH
Ghostfolio
Open source wealth management software for tracking stocks, ETFs, and cryptocurrencies. Built with Angular + NestJS + Prisma, self-hostable via Docker or cloud deployment. Privacy-focused with data ownership, supports multi-account management and portfolio performance tracking.
open-sourcewealth-managementportfolio-tracker
📱 Mobile Operating SystemsCA
GrapheneOS
Privacy and security focused mobile operating system with Android app compatibility. Developed as a non-profit open-source project, GrapheneOS hardens the Android Open Source Project with exploit mitigations, sandboxed Google Play, and a strict permission model.
open-sourceoperating-systemmobile
📊 AnalyticsDE
HitKeep
HitKeep is open-source, privacy-first web analytics software for self-hosted or managed cloud deployment.
open-sourceweb-analyticsprivacy
🏠 Smart HomeUS
Home Assistant
Open-source home automation platform with local-first control, broad device integrations, and optional paid cloud add-ons.
open-sourcesmart-homehome-automation
🎨 Design & GraphicsUS
Inkscape
Inkscape is a free, open-source vector graphics editor for Linux, Windows, and macOS. It is used to create logos, illustrations, typography, and diagrams, uses SVG as its native format, and supports import/export of formats such as AI, EPS, PDF, PS, and PNG. It is well suited for designers, illustrators, and technical users who want a local, non-cloud design tool.
open-sourcevector-graphicssvg
📺 Media ServerCA
Jellyfin
Volunteer-built free software media server for self-hosted media streaming. Fork of Emby created in 2018 after Emby went proprietary. No central servers, no tracking, no phone-home. Full open-source under GPL-2.0 with client and server code available on GitHub.
open-sourcemedia-serverstreaming
🔐 Password ManagerDE
KeePass
The original free, open source password manager. Stores all passwords in one encrypted database locked with a master key. Uses AES-256, ChaCha20 and Twofish encryption. Windows-focused but with cross-platform ports.
open-sourcepassword-managerprivacy
🔐 Password ManagerDE
KeePassXC
Community-driven, fully offline password manager that stores credentials in an encrypted local database — no cloud, no account, no subscription. Cross-platform C++ rewrite of KeePass with modern UX, browser integration, SSH agent support, and TOTP, trusted by privacy advocates worldwide.
open-sourcepassword-managerprivacy
📋 Project ManagementAT
Kimai
Kimai is an open-source web-based time-tracking application for teams, available for self-hosting or as SaaS.
open-sourceself-hostedsaas
🎨 Design & GraphicsNL
Krita
Krita is a free and open-source digital painting and illustration application for artists, illustrators, concept designers, and studios. It provides advanced brush engines, layer and mask workflows, color management, drawing assistants, animation tools, and cross-platform desktop builds, making it a capable production tool for creating professional digital art without requiring a vendor cloud service.
open-sourcedigital-paintingillustration
📄 Office SuiteDE
LibreOffice
Community-driven, full-featured office suite backed by The Document Foundation in Berlin. Offers Writer, Calc, Impress, Draw, Base and Math — all fully compatible with Microsoft formats — and is one of the most widely deployed open-source productivity suites worldwide.
open-sourceoffice-suitemicrosoft-office
💻 Desktop Operating SystemsUS
Linux Kernel
The upstream Linux kernel is a globally maintained, GPL-licensed operating-system kernel distributed via kernel.org. It combines transparent review with frequent stable/LTS updates, while real-world security still depends on downstream patch speed and local update discipline.
open-sourcedesktop-osoperating-system
🌐 BrowserSE
Mullvad Browser
Privacy-focused browser developed by the Tor Project in collaboration with Swedish VPN provider Mullvad. Designed to minimise tracking and fingerprinting out of the box — without requiring a VPN — by shipping the same anti-fingerprinting protections as the Tor Browser.
open-sourcebrowserprivacy
🎥 Meeting SoftwareDE
Nextcloud Talk
Self-hosted video conferencing and team chat built into the Nextcloud platform. Supports HD video calls, screen sharing, breakout rooms, webinar recording, and end-to-end encrypted calls. Requires a Nextcloud server installation — it cannot run standalone — but integrates tightly with Nextcloud Files and Groupware for a unified collaboration workspace.
open-sourcemeeting-softwarevideoconferencing
📋 Project ManagementDE
OpenProject
The leading open-source project management software from Berlin, supporting classic waterfall, agile Scrum, and hybrid workflows. With Gantt charts, boards, time tracking, budgets, and BIM modules, OpenProject serves teams in governments, enterprises, and NGOs across Europe — all self-hostable under the GPL.
open-sourceproject-managementjira