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GeezerVison is showing professional.wiki — Our Projects

Our Projects

Over 40 open-source MediaWiki extensions and counting, built for our clients and shared with the community.

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MediaWiki Extensions

Open-source MediaWiki extensions created for our clients via our MediaWiki extension development services

Native Markdown
Markdown as a native MediaWiki content model
MediaWiki logo

Write whole wiki pages in Markdown, rendered as real wiki pages with working links, categories, templates, a table of contents, and full-text search.

Source code Documentation Demo video
Wikibase Faceted Search
Created in 2025 for the NFDI-consortium MaRDI
Wikibase logo

Easily filter and find your Wikibase data.

Source code Documentation Demo video
Member Access
Members-only wikis with email one-time-code login
MediaWiki logo

Turn your MediaWiki into a members-only wiki. Readers log in with an email one-time code, admitted by an allowlist of addresses and domains organized into named groups.

Source code Documentation
Automated Values
Created in 2022 for the Luxembourg Ministry of Culture
Wikibase logo

Wikibase extension that lets you define rules to automatically set labels or aliases based on Statement values.

Source code Documentation Demo wiki Demo video
Page Approvals
Created in 2024 for a major multinational corporation
MediaWiki logo

Increase trust in your knowledge base via approval workflows for wiki pages.

Source code Documentation
Persistent Page Identifiers
Created in 2024 for Meemoo and Podiumkunsten
MediaWiki logo

Reference your wiki pages with stable, unique identifiers that remain unchanged even when pages are renamed, moved, or deleted and restored.

Source code Documentation
Wikibase Export
Created in 2022 for the University of Mannheim
Wikibase logo

Wikibase Export adds a user-friendly and customizable export interface to Wikibase.

Source code Documentation Demo wiki Demo video
Rules
Created in 2025 for a major multinational corporation
MediaWiki logo

Automated page categorization based on rules defined via a user-friendly configuration interface

Source code Documentation
SPARQL
Created in 2023 for Freie Universität Berlin
MediaWiki logo

Run SPARQL queries and template their results via Lua.

Source code Documentation
Slash Commands
Created in 2023 for a major multinational corporation
MediaWiki logo

Increase your productivity with slash commands integrated into MediaWiki's visual editor.

Source code Documentation
External Content
Created in 2022 for Pega Systems
MediaWiki logo

Lets you embed and render markdown files into wiki pages. Has special integration with GitHub and Bitbucket.

Source code Documentation Demo video
Wikibase RDF
Created in 2022 for the Wikibase Stakeholder Group
Wikibase logo

Wikibase extension that lets you define RDF mappings for Wikibase Entities.

Source code Documentation Demo wiki
Wikibase EDTF
Created in 2021 for the Luxembourg Ministry of Culture
Wikibase logo

Wikibase extension for the Extended Date/Time Format (EDTF) Specification that is specifically designed to process more complex dates and times.

Source code Documentation Demo wiki Demo video Library source
Wikibase Local Media
Created in 2020 for the Rhizome
Wikibase logo

Adds support for local media files to Wikibase via a new data type.

Source code Documentation Demo video
Network
Created in 2020 for KDZ Centre for Public Administration Research
MediaWiki logo

Extension for visualizing connections between wiki pages via an interactive network graph.

Source code Documentation Demo video
Semantic Wikibase
Created in 2020 for Frans AL van der Horst
Semantic MediaWiki logo

Make Wikibase items and properties available in Semantic MediaWiki.

Source code Documentation Demo video
Modern Timeline
Created in 2019 for KDZ Centre for Public Administration Research
Semantic MediaWiki logo

Provides a modern timeline visualization for Semantic MediaWiki as a result format.

Source code Documentation
SubPageList
Created in and maintained since 2010
MediaWiki logo

Lightweight MediaWiki extension to display lists of subpages via a customizable parser function.

Source code Documentation
SimpleBatchUpload
Maintained since 2019
MediaWiki logo

Adds a simple upload interface for uploading multiple files that you can reach via embeddable buttons.

Source code Documentation
Maps
Created in 2009 during Google Summer of Code
MediaWiki logo

Google Maps and Leaflet integration for MediaWiki. Embed dynamic and highly customizable maps into your wiki. Features a visual map editor and integration with Semantic MediaWiki.

Source code Documentation Demo wiki Demo video

Skins & Libraries

Other open-source projects by Professional Wiki

Chameleon Skin
Created in 2014
MediaWiki logo

We maintain Chameleon, the most popular mobile and responsive MediaWiki skin. Chameleon is highly customizable, often used by companies to brand their corporate wikis in line with their corporate identity.

Source code Documentation Example wikis
EDTF Library for PHP
Maintained since 2021

A PHP library for parsing, representing, and working with values that follow the Extended Date/Time Format specification.

Source code Documentation

Customer Testimonials

Professional Wiki provided Rhizome with competent and timely custom development work. Making use of all the tools that are available to open source developers today, the team built extensions that follow modern software design guidelines, are easy to install, configure, and maintain, and include good documentation and automated testing. Quite unique in the Mediawiki space!
Dragan Espenschied, Preservation Director at Rhizome
We wished to display SPARQL query results in our Wikibase and commissioned Professional Wiki to develop a solution. They created a flexible extension that is just what we needed.
Dr. Tim Conrad, Professor at Freie Universität Berlin, for SPARQL
Professional Wiki recently developed an extension for TheaterEncyclopedie quickly and well. They fully live up to their name: they are professional and know everything about (Semantic) MediaWiki!
Milco Feijnenbuik, editor-in-chief at TheaterEncyclopedie (University of Amsterdam), for Persistent Page Identifiers
Professional Wiki helped us to fine tune our requirements and created the excellent Wikibase Export extension for non-technical users. It's very clean, clear and user-friendly.
Dr. Renat Shigapov, Koordinator der NFDI AG „Knowledge Graphs" at Universität Mannheim, for Wikibase Export

From Our Blogs

Best MediaWiki Extensions
MediaWiki Extensions
Best MediaWiki Extensions

With thousands of extensions available, it can be tough to know which ones are most useful. We've compiled a list of the 15 best MediaWiki extensions.

Profile picture of Karsten
Karsten Hoffmeyer
March 28, 2025 · 5 min read
Top Wikibase Extensions
Wikibase
Top Wikibase Extensions

Discover the top Wikibase extensions in our curated list. These 17 MediaWiki extensions provide enhanced search, data validation, media support, export, and more.

Profile picture of Jeroen
Jeroen De Dauw
March 14, 2025 · 8 min read
Wikibase Faceted Search
News
Wikibase Faceted Search Released

A new extension that adds faceted filtering to Wikibase search. Combine full-text and structured queries, filter by Statement values and Item types, and configure it all on-wiki.

Profile picture of Jeroen
Jeroen De Dauw
June 10, 2025 · 3 min read
View all posts about MediaWiki extensions

Ready to build something great?

Contact us

Explore MediaWiki Services

Software Development icon
Software Development

Get superior results from the best MediaWiki developers with a proven track record of creating MediaWiki extensions & integrations.

Explore MediaWiki Development
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Theme Development

Make your wiki look great! Use a time-tested responsive MediaWiki theme, or have us create a custom MediaWiki skin for you.

Style Your Wiki
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MediaWiki Hosting

Let us take care of your wiki. We are MediaWiki hosting experts and provide cloud hosting, dedicated hosting, and on-premise hosting.

Find the Perfect Wiki Hosting Plan
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MediaWiki Consulting

Bring your wiki to the next level by leveraging our MediaWiki expertise. From strategic planning to wikitext, we have you covered.

Explore Our Consulting Services
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MediaWiki Migration

Migrate your wiki with confidence. We move your MediaWiki to a new home, or we help you migrate from another system to MediaWiki.

Migrate Your Wiki
MediaWiki Upgrades icon
MediaWiki Upgrades

Keep your MediaWiki up-to-date and secure. We offer MediaWiki maintenance services to keep your wiki running smoothly.

Secure & Update Your Wiki
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