TurboLinux Products
- Software to turn an existing network of computers into a cluster.
- http://www.turbolinux.com/products/index.html

Platform Computing Corporation
- Offers distributed computing software for workload management, job scheduling, resource sharing across clusters, file transfers, and provides insight into the performance of distributed resources. Product information, events, and manuals.
- http://www.platform.com/

Pallas
- Compilers and developers' tools for high performance and parallel computing.
- http://www.pallas.de/

Dolphin Interconnect
- Scalable Coherent Interface adapter cards, bridge chips, switches, and Beowulf kits. Product information, whitepapers, benchmarks, and drivers available for download.
- http://www.dolphinics.com/

Multitude
- Designs massively parallel computers. DANCE compiler available for download.
- http://www.multitude.net/

Southwest Parallel Software
- SPSoft provides high-performance and high-throughput bioinformatics software solutions on general-purpose computer systems.
- http://www.spsoft.com

Myricom
- High-performance networking for cluster communication. Sells interconnect hardware and provides open-source message passing software. Product information, benchmarks, and links to customer research projects.
- http://www.myri.com

Network Computing Services
- Provides a variety of capabilities for its customers, including shared-computing services on some of the world's most powerful High-Performance Computer (HPC) systems available in a commercially accessible network.
- http://www.networkcs.com

Emulex
- Develops, markets and supports high-performance storage networking products for Intel-based server clusters.
- http://www.emulex.com/

KAI Software
- Compilers to parallelize software using OpenMP. Product information
- http://www.kai.com

Midwest Technology
- Midwest Technology provides previously owned IBM SP2 and RS/6000 systems.
- http://www.mtleasing.com/

PSP group at UT Austin
- PSP stands for Programs, Specifications and Proofs. The emphasis of the work of our group is to derive parallel and distributed programs in a rigorous manner.
- http://www.cs.utexas.edu/users/psp/welcome.html

The Portland Group
- PGI is an independent supplier of high performance scalar and parallel compilers and tools for workstations, servers, and high-performance computing systems.
- http://www.pgroup.com/

ParTec
- Builds parallel computing clusters from commodity hardware using a high performance communication subsystem. Information about products, downloadable manuals, research papers.
- http://www.par-tec.de/

DeVita Associates
- Distributor of Beowulfs and custom failover cluster systems. Product information and white papers about clustering.
- http://www.devita.com/

Brain Murmurs
- Research and development in software for parallel computers.
- http://brainmurmurs.com/