Free process software for linux

Supervisor is a client/server system that allows its users to control a number of processes on UNIX-like operating systems. It was inspired by the following:
- It is often inconvenient to need to write "rc.d" scripts for every single process instance. rc.d scripts are a great lowest-common-denominator form of process initialization/autostart/management, but they can be painful to write and maintain. Additionally, rc.d scripts cannot automatically restart a crashed process and many programs do not restart themselves properly on a crash. Supervisord starts processes as its subprocesses, and can be configured to automatically restart them on a crash. It can also automatically be configured to start processes on its own invocation.
- Its often difficult to get accurate up/down status on processes on UNIX. Pidfiles often lie. Supervisord starts processes as subprocesses, so it always knows the true up/down status of its children and can be queried conveniently for this data.
- Users who need to control process state often need only to do that. They dont want or need full-blown shell access to the machine on which the processes are running. Supervisorctl allows a very limited form of access to the machine, essentially allowing users to see process status and control supervisord-controlled subprocesses by emitting "stop", "start", and "restart" commands from a simple shell or web UI.
- Users often need to control processes on many machines. Supervisor provides a simple, secure, and uniform mechanism for interactively and automatically controlling processes on groups of machines.
- Processes which listen on "low" TCP ports often need to be started and restarted as the root user (a UNIX misfeature). Its usually the case that its perfectly fine to allow "normal" people to stop or restart such a process, but providing them with shell access is often impractical, and providing them with root access or sudo access is often impossible. Its also (rightly) difficult to explain to them why this problem exists. If supervisord is started as root, it is possible to allow "normal" users to control such processes without needing to explain the intricacies of the problem to them.
- Processes often need to be started and stopped in groups, sometimes even in a "priority order". Its often difficult to explain to people how to do this. Supervisor allows you to assign priorities to processes, and allows user to emit commands via the supervisorctl client like "start all", and "restart all", which starts them in the preassigned priority order. Additionally, processes can be grouped into "process groups" and a set of logically related processes can be stopped and started as a unit.

Watsup is a system and process monitor for CPU, memory, page faults, disk IO, network IO.
Low overhead. GUI controls. Formatted report in window. Sample interval down to 0.1 secs. Choose font size. System resources: CPU (1-4), memory (free/used/cache), page faults (hard/soft), disk IO, network IO. Process resources: same + execution file name.
Main features:
- overhead is about 1/3 as much
- sample interval as low as 0.1 seconds is supported
- overall system and top process resources are shown on one page
- disk I/O, network I/O, and page fault rates can be monitored
- font can be made small (for display in a corner) or large (whole screen)
- the top N processes are displayed with minimal jumping around between samples
- (which makes it easier to watch one or a few processes)
- process ranking is a weighted sum of CPU, hard page faults, and disk I/O

Java Parallel Processing Framework is a set of tools and APIs to facilitate the parallelization of CPU intensive applications, and distribute their execution over a network of heterogenous nodes.
Java Parallel Processing Framework is intended to run in clusters and grids.
Main features:
- an API to delegate the processing of parallelized tasks to local and remote execution services
- a set of APIs and user interface tools to administrate and monitor execution services
- real-time adaptive load balancing capabilities
- scalability up to an arbitrary number of processing nodes
- support for failover and recovery
- limited intrusiveness for existing or legacy code
- a dynamic deployment mechanism, that enables the execution of new, or updated, code without having to deploy onto the grid
- fully documented APIs, administration guide and developer guide
- runs on any platform supporting Java 2 Platform Standard Edition 5.0 (J2SE 1.5)
Enhancements:
- JPPF is now licensed under the terms of the Apache License, Version 2.0. Starting from JPPF 1.0 beta1, all releases will be licensed under these terms.
- Prior versions will remain under the terms of the LGPL.
- For the first time, JPPF integrates seamlessly with J2EE. The JPPF Resource Adapter provides J2EE application servers with an access to native grid services.
- Numerous bug fixes, especially with regards to the distributed class loading mechanism.

Qps is a visual process manager, an X11 version of "top" or "ps" that displays processes in a window and lets you sort and manipulate them.
Main features:
- change nice value of a process
- alter the scheduling policy and soft realtime priority of a process
- display the TCP/UDP sockets used by a process, and names of the connected hosts (Linux only)
- display the memory mappings of the process (which files and shared libraries are loaded where)
- display the open files of a process, and the state of unix domain sockets
- kill or send any other signal to selected processes
- display the load average as a graph, and use this as its icon when iconified
- show (as graph or numbers) current CPU, memory and swap usage
- sort the process table on any attribute (size, cpu usage, owner etc)
- on SMP systems running Linux 2.1 or later (or Solaris), display cpu usage for each processor, and which CPU a process is running on
- display the environment variables of any process
- show the process table in tree form, showing the parent-child relationship
- execute user-defined commands on selected processes
- display MOSIX-specific fields and migrate processes to other nodes in a cluster

pita is client-server music player. A daemon process, pitad, maintains a queue of files which it plays through the sound system.

Various clients manipulate the daemon, adding songs, moving through the queue, etc.

MySysop is a PHP tool with AJAX support for managing MySQL server settings and monitoring process, variables, and status.
Enhancements:
- This version has a prototype window for the dialog window, new stats, and minor bugfixes.

htop is an interactive process viewer for Linux.
htop project requires ncurses. Tested with Linux 2.4 and 2.6.
Enhancements:
- This release contains stability and statistics fixes.
- Upgrading is recommended.