Carrera Computers  
   Pentium-based Beowulf clusters. Product specs.
   http://www.carrera.com/

ParTec AG  
   Sells high-performance clusters. Product and contact information.
   http://www.par-tec.com/

Scali AS  
   Provides scalable Linux and Solaris based cluster computer systems ranging from high performance clustering kits to turnkey supercomputers with cluster management tools. Product information.
   http://www.scali.com/

Linux NetworX  
   Custom rackmountable Linux clusters with graphical management tools. Product information and company news.
   http://www.linuxnetworx.com/

Penguin Computing  
   Intel-based rackmountable clusters with traffic management software.
   http://www.penguincomputing.com/

PSSC Labs: The Beowulf People  
   Provides custom Beowulfs and workstations. Online quote form.
   http://www.pssclabs.com/

RackSaver, Inc.  
   Specializes in Beowulf clusters with tiny footprints. Product information.
   http://www.racksaver.com/

Integrity Linux  
   Customizable Linux clusters with parallel software. Product and contact information.
   http://www.integritylinux.com/

VA Cluster Management  
   Cluster monitoring software. Product information, documentation, and source code available.
   http://www.valinux.com/software/vacm/

Atipa  
   Atipa provides scalable, high performance, turnkey Alpha, AMD, and Intel-based Beowulf clusters. Product information.
   http://www.atipa.com/

Microway  
   Alpha, Athlon, or Pentium Linux clusters. Product and contact information.
   http://www.microway.com/

Linux Computer Systems  
   Customizable Beowulf nodes, workstations, and servers. Product and contact information.
   http://www.linuxcomputersystems.com/

Aspen Systems, Inc.  
   Manufacturing, design and service of HPC clusters and other high-performance systems.
   http://www.aspsys.com/

hpcLine  
   Rackmountable clusters with Myrinet interconnects. Product information and datasheets.
   http://www.hpcline.com/

Western Scientific, Inc.  
   Provider of turnkey Beowulf computing cluster hardware for different platforms from Intel, AMD, Alpha, and HPC.
   http://www.wsm.com/

VA Linux Systems: ClusterCity  
   Rackmountable Intel-based Beowulfs with cluster management software. Product and contact information.
   http://www.valinux.com/systems/clustercity.html

Atipa Technologies  
   Specializes in the design and turn key installation of large computational clusters based on Intel, AMD, and Alpha processors. Information about products and online ordering available.
   http://www.atipatechnologies.com/

Armari Ltd  
   Sells rack-mountable Intel-based computers as well as workstations and servers. Product information.
   http://www.armari.co.uk/

RocketCalc  
   Manufactures affordable personal clusters and monitoring tools. Information about products.
   http://www.rocketcalc.com/

Advanced Clustering Technologies  
   Advanced Clustering sells turn-key beowulf clusters with AMD or Intel processors. Configurable online ordering.
   http://www.advancedclustering.com/

AcceleratedServers  
   Customize 1U, 2U and 4U rackmount and tower servers and server clusters running Linux, FreeBSD or Windows.
   http://AcceleratedServers.com/

GSH Intelligent Integrated Systems, Inc.  
   Custom rackmountable Linux clusters.
   http://www.gshiis.com/