Apache Mesos is a cluster manager that provides efficient resource isolation and sharing across distributed applications, or frameworks.

Spark is an open source cluster computing system that aims to make data analytics fast — both fast to run and fast to write.

Cobalt is a HPC job management suite supporting compute clusters and the IBM BlueGene series.

Grid computing scheduler.

Grid computing management software.

TORQUE Resource Manager provides control over batch jobs and distributed computing resources.

SLURM is an open-source resource manager designed for Linux clusters of all sizes.

Gproc is a new system, written in Go, that combines features of the LANL version of bproc (http://sourceforge.net/projects/bproc/) and the xcpu software (xcpu.org). Unlike bproc, gproc requires no kernel patch. Like both of them, it provides a process startup mechanism for lightweight cluster nodes which have only a small ramdisk as the root file system, with no local disks or NFS root at all. Lightweight cluster nodes can be very easy to manage if configured correctly (see, e.g., http://portal.acm.org/citation.cfm?id=1132314).

The goal of the Condor® Project is to develop, implement, deploy, and evaluate mechanisms and policies that support High Throughput Computing (HTC) on large collections of distributively owned computing resources.

DRBD® refers to block devices designed as a building block to form high availability (HA) clusters. This is done by mirroring a whole block device via an assigned network. DRBD can be understood as network based raid-1.

Eucalyptus is an open-source system for implementing on-premise private and hybrid clouds using the hardware and software infrastructure that is in place, without modification.

PP is a python module which provides mechanism for parallel execution of python code on SMP (systems with multiple processors or cores) and clusters (computers connected via network).

Pig is a platform for analyzing large data sets that consists of a high-level language for expressing data analysis programs, coupled with infrastructure for evaluating these programs.

The central goal of Lustre is the development of a next-generation cluster file system which can serve clusters with 10,000's of nodes, provide petabytes of storage, and move 100's of GB/sec with state-of-the-art security and management infrastructure.

PelicanHPC is a live CD image that let's you set up a high performance computing cluster in a few minutes.

ParallelKnoppix (PK) is a fast and easy way to create a HPC cluster for parallel computing. It is designed to be easy to use for people new to parallel computing, but it is also suitable for serious work.