The "industry standard in open source monitoring," Nagios provides alerts that can help IT respond to problems before they can cause costly outages. Well-known users include Unisys, Wells Fargo, BT, iRobot, and the Office of the President of the United States. Commercial support and maintenance packages are available from Nagios Enterprises. Operating system: Linux, Unix.
Opsview aims to "unify your monitoring" so that you can track your physical, cloud and hybrid infrastructure from one place. An enterprise version, additional enterprise modules, support, training and consulting services are available for a fee. Operating System: Linux.
The "most widely deployed IDS/IPS technology worldwide," Snort boasts more than 300,000 registered users. Project owner Sourcefire offers paid consulting and training, as well as commercial products based Snort and sister project ClamAV. Operating System: Linux, Unix, OS X.
Calling itself the "ultimate open source monitoring solution," Zabbix provides a huge range of monitoring, alerting and visualization features. Several different levels of commercial support are available, as well as training and other services. Operating System: Windows (agent only), Linux, OS X.
Perhaps the most well-known commercial open source software company, Red Hat's flagship enterprise Linux product for desktops and servers comes with commercial support and other services are also available. The company also offers virtualization products based on the operating system and JBoss Middleware that is available in community or enterprise versions.
Novell's version of Linux also comes with enterprise-grade service and support. The company also offers a variety of other software projects that extend the capabilities of SUSE, as well as servers pre-configured with SUSE Linus Enterprise Server.
Now one of the most popular versions of Linux, Ubuntu carries no licensing fees in any of its versions. Professional support and desktop, server or cloud services are available from owner Canonical.
This enterprise project management software is designed to be both highly scalable and easy to use. Features include the work breakdown structure, project pipeline, cost baseline, plan/actual comparisons, milestone trend analysis, resource utilization, and more. Onepoint comes in a wide variety of editions: basic and community are licensed under GPL and the professional, master, group and enterprise versions require a fee-based commercial license. Operating System: Windows, Linux, OS X.
Vyatta's software and appliances offer enterprises an alternative to expensive networking hardware from companies like Cisco. The core software is available as an open source download, or you can purchase hardware, supported software or services from Vyatta. Operating System: Linux.
openSIS helps school officials keep track of student information, attendance, grades, schedules, report cards, and more. In addition to the free community edition, in comes in paid district or school editions which can be deployed on-premise or accessed in the cloud. Operating System: OS Independent.
This server software for small businesses combines a gateway security, server and networking features in a single download. Key features include multi-WAN, VPN, firewall, anti-malware, anti-spam, intrusion prevention, content filtering, file and print services, mail server, Web server, groupware, and more. While the full software can be downloaded for no charge, ClearCenter also offers paid support, services and hardware based on ClearOS. Operating System: Linux. 61)
Zentyal can act as a security gateway, infrastructure manager, unified threat manager, office server and/or unified communication server. The basic software is available for free, while professional and enterprise versions add support and more features for a fee. Operating System: Linux.
TimeTrex claims to be "the world's most popular open source payroll and time management software." In addition to the free standard edition, it's available in several other versions that can be deployed on-site or used in the cloud. Operating System: Windows, Linux, OS X.
WiKID offers open-source, two-factor authentication that utilizes software tokens for remote access, online banking and other applications that require strong authentication. The enterprise version adds some proprietary code not included in the community version, as well as support. Operating System: OS Independent.