Freedesktop.org
open-source desktop environment software project
freedesktop.org (fd.o), formerly X Desktop Group (XDG), is a project to work on interoperability and shared base technology for free-software desktop environments for the X Window System (X11) and Wayland on Linux and other Unix-like operating systems. Although freedesktop.org produces specifications for interoperability, it is not a formal standards body.
The project was founded by Havoc Pennington, a GNOME developer working for Red Hat in March 2000. Widely used open-source Desktop projects, such as GNOME, KDE's Plasma Desktop, and Xfce, are collaborating with the freedesktop.org project. In 2006, the project released Portland 1.0 (xdg-utils), a set of common interfaces for desktop environments. freedesktop.org joined the X.Org Foundation in 2019. Some of the project's servers are hosted by Portland State University.
Hosted projects
freedesktop.org provides hosting for a number of relevant projects. These include:
Windowing system and graphics
Software related to windowing systems and graphics in general
Cairo, a vector graphics library with cross-device output support
Direct Rendering Infrastructure (DRI), a Linux API to access the graphics hardware, used by X11, Wayland compositors, Mesa 3D, etc.
Glamor, a 2D graphics common driver for X server on graphics chipsets which have support for OpenGL/EGL/GBM APIs
Mesa 3D, an implementation of several graphics APIs such as Vulkan and OpenGL
Pixman, a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization; users include the cairo graphics library and the X.Org Server
Poppler, a PDF rendering library
Video Acceleration API
Wayland, a protocol to replace X11; features: no tearing, lag, redrawing or flicker
X.Org Server, the official reference implementation of the X11 protocol
XCB, an Xlib replacement
Xephyr, a display server
wlroots, a modular Wayland compositor library
Other
D-Bus, a message bus akin to DCOP (KDE 3) and Bonobo (GNOME 2)
Elektra, a library for reading and writing configuration
FreeType, a text rendering library
fontconfig, a library for font discovery, name substitution, etc.
Begin with the source’s own compact description: “Freedesktop.org” is open-source desktop environment software project. The dossier treats that line as a proposition to test through Freedesktop, open-source and desktop, not as a finished interpretation.
Why this record matters
The phrase “open-source desktop environment software project” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Sep 22, 2026. The linked authority identifier is Q310917. 1 of 3 selected statements include explicit references; 2 carry qualifiers and 1 use preferred rank. The first chronological checks are 2000, 2006 and 2019.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Freedesktop.org”, its source revision and the description used here.
- Expand the search: follow Freedesktop.org primary sources, Freedesktop.org archive and Freedesktop research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Freedesktop.org”?
- Which observation, specimen, dataset or publication supports the account?
- Is the terminology current, historical or disputed?
Search terms from this dossier
This entry incorporates text from “Freedesktop.org” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.