Humboldt Solutions  
   Consultancy and software development services, specialising in Linux based embedded systems and device drivers.
   http://www.humboldt.co.uk

Entora Ltd: Open Source Specialists  
   Offers open source-based services and consulting in the UK.
   http://www.entora.co.uk

SoundByte Digital Ltd.  
   Specializes in administration of Unix and Linux systems. London area.
   http://www.soundbyte.co.uk

Philip Hands Computing Ltd.  
   UK consultant specializing in free software.
   http://www.hands.com/

Linxit Research Ltd.  
   Southampton, England. Services include network configuration and management, internet security, and server configuration.
   http://www.linxit-research.co.uk

Alcove  
   Open-source software consultants. Other services include technical support and certification. Offices in France & Germany.
   http://www.alcove.com/en/index

Mind Linux Solutions  
   Linux and other open source software in Belgium.
   http://mind.be/

Xynica  
   UK based Linux consultancy offering a full range of Linux and Unix support services.
   http://www.xynica.com/

MacLeod Group Consulting  
   Linux work undertaken, Service Level Agreements offered, security testing. Portmahomack, Scotland.
   http://www.macleod-group.com

Jon Masters - Professional UN*X consulting  
   Young GNU/Linux and general UNIX consultant. University of Nottingham student.
   http://www.easypenguin.co.uk/people/jcm/

Arte Numérica  
   Consulting services and custom solutions. Uses open-source tools. Portugal.
   http://artenumerica.com/

Clues Limited  
   London based. Mail systems, firewalls and system design.
   http://www.clues.ltd.uk/

Kingpin Linux  
   Open Source and Information Security Solutions. Edenbridge, Kent.
   http://www.kingpinlinux.co.uk/

Digibel OpenSource Suppport  
   Supports and implements the Linux Operating System. Benelux and Europe
   http://www.digibel.be

C@LL - Conseil Internet & Logiciels Libres  
   Free Software consulting - specializing in web and database. Zope, and Ht Dig. Creates GPL software. Monaco.
   http://www.librelogiciel.com/

Juraj Bednar  
   Remote LINUX installation, administration and security with regard to penetration testing, and audits. Banska Bystrica, Slovak Republic.
   http://jurajbednar.com/

Dynnocht Computer Services  
   Free/Open Source software specialist and chartered information systems practitioner. Located in Cumbernauld, Scotland.
   http://www.dynnocht.co.uk/

Ziggurat Communications Ltd.  
   Design, installation and support for Linux, open source software and data networks. Located in the UK.
   http://www.zigg.net/

OpenIT  
   Turnkey installations and maintenance of Linux systems for schools and small to medium sized businesses. Finland.
   http://www.openit.fi/

SycamoraTree  
   Migration to open source programs and security issues. Sweden.
   http://www.sycamoratree.com/

LINBIT Information Technologies GmbH  
   DRBD for cluster solutions for all Linux-based applications.
   http://www.linbit.com/

Sirius  
   Open Source Software specialists. Offer consultancy, support and training services. Based in the UK.
   http://www.siriusit.co.uk/

Inwire.net  
   Support and customization of open source products such as sendmail, BIND, Apache. Remote and prepaid available. Darmstadt, Germany.
   http://www.inwire.net

Linugen  
   Consulting, support, development and training services focused on Linux and Open Source applications. Schoten, Belgium
   http://www.linugen.com

IT-OPTICS s.a.  
   Networking expertise and Linux and Open Source.Mons, Belgium.
   http://www.it-optics.com

Linux4biz  
   Consultancy in London. Office in India.
   http://www.linux4biz.net

DLC Computer Solutions  
   Support Linux and integration with existing Networks. Coventry, UK.
   http://www.dlc-online.co.uk

J-Cubed Ltd  
   Linux system specialists. Bespoke software development, database and E-commerce systems. Bournemouth, UK.
   http://www.jcubed.co.uk

The Linux Academy  
   Software development, support and training. Southampton, UK.
   http://the-linux-academy.co.uk

Openstrike  
   Linux and open source consultancy offering migration, training, contract administration and programming. South East England.
   http://www.openstrike.co.uk/

Linux Technologies  
   Installation and configuration of Linux systems, Migration to Linux and Linux system maintenance.
   http://www.linuxtechnologies.co.uk/

Just Servers Ltd  
   Linux systems for use as Firewalls, Anti-Spam, Anti-virus and full small business solutions.
   http://www.just-servers.co.uk

Help4Hosters  
   Technical support for hosting companies.
   http://www.help4hosters.com

embedded linux custom software services  
   Embedded linux software consultants, custom design, board bring-up, vxworks port
   http://www.katalix.com

Suretec Systems Ltd.  
   Located in Aberdeen, Scotland, UK. Specialised on Linux consulting, also support for home users.
   http://www.suretecsystems.com

Open Development Group  
   Consulting and development for open source software based in Iceland.
   http://www.odg.cc

Mathias Kettner  
   Consulting and training based in Munich, Germany. Emphasis on system integration in middle and large companies.
   http://mathias-kettner.com

The Penguin Factory  
   Linux and Open Source solutions providers based in Glasgow, Scotland.
   http://www.penguinfactory.co.uk