I have collected a simple list of powerfull Management and Monitoring applications. Just check them out.
(_don’t make comments about the size of this post_! ) 
*ZENOSS*
* Organization-wide, IT infrastructure monitoring
* Scales to handle 10,000′s of resources
* Integrated monitoring of availability, performance, events and configuration changes
* Across layers: network, servers, apps, environment…
* Across platforms: Windows, Linux, Unix …
* Automated discovery and configuration modeling
* Role-based access through web portal
* Group-level views, settings and reporting
* Collection via SNMP, WMI, Telnet, SSH, Syslog
* Licensed under GPL
* built in (Python using Zope, MySQL, RRDtool, PySNMP, Net-SNMP, libsmi, sendpage, Twisted
*Pandora*
* Pandora are a Free Software set of programs that allows to analyze in a visual way status and performance of several parameters from different Operating Systems, servers, applications and hardware systems as Firewalls, Proxies, Data Bases, Web Servers or Routers. All integrated into an open and distributed architecture.
* Pandora can be deployed in every Operating System. You have an agent for every platform. Pandora can monitor hardware systems with TCP/IP Stack, as load balancers, routers, switches, printers and so on.
* Pandora has six components: Pandora Data Server, Pandora Network Server, Pandora SNMP Console, Pandora Agents, Pandora Database and Pandora Web Management System (Web Console).
* buil in (PHP)
*openSIMS*
* openSIMS is a Security Infrastructure Management Systems distributed as an open source project through SourceForge, using a modified Mozilla Public License.
* OpenSIMS ties together NMap, Snort, and other open source tools into a Security Infrastructure Management System
* built in (JAVA)
*OpenEMS*
* Operations Console enables a centralized monitoring and management of all computing resources across the enterprise
* Flexible Management of the data center resources using a centralized, distributed or hybrid approach support each enterprise’s unique architecture, operations standards and procedures
* Ability to define, provision, monitor and manage critical business processes – scales provisioned service instances up or down depending on external factors such as application load and resource performance
* Publish & Subscribe messaging environment allows administrators to receive real-time alerts when critical (or defined) events occur across the grid
* Intelligent Orchestration Engine not only assures that all services are completed effectively but also provide an intelligent self-learning engine to optimize the business service performance
* Automatic orchestration – All workflows and compute intensive services are automatically optimized using Dynamic Sense and Respond Architecture – based on the rules defined in the OpenEMS rule engine
* Operations Intelligence tool provides a dashboard for IT executives to monitor and assess business impacts of their IT systems performance more holistically than ever before
*NetDirector*
* NetDirector is a client-server application that allows you to simultaneously manage a large number of servers from a single web browser running on any platform. The NetDirector Server Manager web user Interface uses AJAX (asynchronous javascript and XML) to give the same rich client experience of a desktop application but with the flexibility to use the server manager from any desktop browser.
*enomalism*
* Enomalism Virtualized Management Console (VMC) is a open source web-based systems administrator management tool for XEN hypervisor. Servers with hundreds of multiple isolated virtualized systems can be managed like a standalone server. Enomalism also includes a virtual server creation wizard and templates to facilitate virtualized server configuration, application deployment and centralized software patch management
* The Enomalism application provides a single interface for managing multiple virtualized servers across assorted platforms. The same administrator can monitor and administer both Linux and Windows servers using the same interface without having to learn extensive OS skills. Enomalism eases cross-server and large server farm management. Applications can be deployed and updated on many servers simultaneously. The application console provides a centralized look at server information and software versions across all server resources, facilitating versioning and patch management.
*Babel*
* Babel is an enterprise-grade auditing system to manage a consistency on security policy between different systems in a non-homogeneus architecture. Babel allows to manage very different operating systems, like AIX, Solaris, Windows 2000, Windows XP, Linux, BSD or HPUX.
* Babel allows administrator team to monitor the hardening level of their systems and keep constantly monitored, using alarms, periodic policy polling, and of course, a WEB Based, centralized management for all systems.
* Babel uses a pragmatic point of view and try to evaluate security aspects on your systems that could be improved by the administrators. Babel is not intrusive, it only collect information and manage all this information.
*OpenQRM*
* Data Center Management Capabilities
* Manages thousands of servers
* Tracks your data center’s usage and utilization while generating detailed reports
* Automatic, Policy based Provisioning:
Assigns servers to users and applications according to defined policies
* Dynamically adjusts the amount of allocated servers according to actual usage
* Provides high availability for enterprise services and applications
* Redeploy applications and prepare machines for maintenance with a single click
* Separate running applications from physical servers, thereby allowing flexible use of resources and ease of management
* Advanced image management allows shared resources between similar environments
* Supports booting servers from local disk, NAS or iSCSI
* Supports different partitioning technologies, such as VMWare and Xen
* Full support for servers running Linux 2.4 and 2.6
* Partial support for servers running Microsoft Windows
* Use simple tools to add servers and applications to the openQRM management coverage
* Integrate and leverage existing infrastructure software such as VMWare, Nagios and others
* Use ready made packages to support specific configurations like 3-tier web applications environment
* Secure Web Interface provides easy management and control
* Powerful Command Line Interface (CLI) allows custom scripts
* Complete “triggers” mechanism allows users to hook their own applications and scripts to events happening in the system
* Advanced Plug-in architecture allows the addition of new components to any part of the system — including user interface, monitoring agents, decision engines and more
* Plug-ins can be written in Java, PHP or any scripting language
* Open Source Code allows advanced users to modify the system according to their needs
*OSSIM*
*Its goal is to provide a comprehensive compilation of tools which, when working together, grant a network/security administrator with detailed view over each and every aspect of his networks/hosts/physical access devices/server/etc…
Besides getting the best out of well known open source tools, some of which are quickly described below these lines, ossim provides a strong correlation engine, detailed low, mid and high level visualization interfaces as well as reporting and incident managing tools, working on a set of defined assets such as hosts, networks, groups and services.
All this information can be limited by network or sensor in order to provide just the needed information to specific users allowing for a fine grained multi-user security environment. Also, the ability to act as an IPS (Intrusion Prevention System) based on correlated information from virtually any source result in a useful addition to any security professional.
_and much more out there_ …
Open Management Consortium
and thats great. I also have mapped the old xml/rss/atom url to this new one, so once again I haven’t lose you 