Pretty Damn Quick (PDQ) analytically solves queueing network models of computer and manufacturing systems, data networks, etc., written in conventional programming languages. Generic or customized reports of predicted performance measures are output.
Simple WAN Simulator (simWANsim) is a SIMPLE WAN simulator that configures specific network intefaces in order to simulate high-latency networks typical in WAN setups.
SQS is the Simple QueueingSystem that allows jobs to be run in sequence on one or more machine. The queues can be inspected, jobs can be deleted from queues even when running, and jobs can be held. The latest version as at the end of 2011 is sqs-3.1.
OpenJCS (Job Control System) is a batch scheduling and control system for use on Unix systems which uses load balancing, dependency control, scheduling, runbooks, queueing and resource allocation subsystems for unmatched scalability and flexibility.
sharq is a batch-queueingsystem that allows for multiple users to make effective use of a beowulf cluster. sharq allows for prioritization based on a user's funding, and also based on the size of the job. sharq is very light-weight and easy to learn.