checkmySAP is a simple and efficient Hobbit / Xymon extension to monitor remote SAP services on your network. Using 3 SAP binaries (lgtst, rfcping, and startrfc), it checks the availability of your SAP systems via remote RFC command. It it written in bash, and can be set up in less then 5 minutes.
Check_MK is a complex addon for Nagios/Icinga and consists of three subprojects. The check and inventory system Check_MK is a general purpose Nagios plugin for retrieving data. It adopts a new approach for collecting data and obsoletes NRPE, check_by_ssh, NSClient, and check_snmp. It features a significant reduction of CPU use on the Nagios host and automatic inventory of items to be checked, and is especially useful with larger Nagios installations. "MK Livestatus" gives immediate and fast access to live and historic Nagios status data. It's a supported backend for many addons including NagVis, NagiosBP, and Thruk. "Check_MK Multisite" is a feature complete replacement for the Nagios GUI, and uses MK Livestatus as a backend. It is very fast, and supports efficient distributed monitoring.
ExtSQL is not a new database server. It is a significant set of independently developed software additions and patches to the existing source code of both MySQL and PostgreSQL. It provides a new set of SQL language features that make it easy for a DBA to monitor and audit activity on a busy server and account for activity by user, database, or even connecting client host. It even includes the ability to store historical usage data in amounts and time intervals specified by the DBA. It is not a separate monitoring utility, but built into the core of both servers.
GoAccess is a real-time Web log analyzer and interactive viewer for almost every Web server. It runs in a terminal and provides fast and valuable HTTP statistics for system administrators that require log monitoring and visual reports on the fly. GoAccess can monitor unique visitors, browsers, spiders, OS, hosts and IP geolocation, keyphrases, referring sites, status codes, etc. It has support for IPv6 and it parses nearly any Web log format.
GroundWork Monitor Community Edition can give you insight into your computing infrastructure, allowing you to see the current and historical states of all your computers: servers, desktops, and laptops, all of your network devices, all of your services (like TCP/IP and Web services), and all of your applications (like mail servers and database apps). You can choose to be alerted when something goes awry via pager, SMS, email, or phone, and even set up automatic restarts or fall-overs.