topvhost is a curses-based display of virtual host activity on a Web server. The display is created by monitoring a collection of server log files to show update time, update count, and selected fields from the last record of each file in a top-like presentation which can be sorted by last update time, update count, or domain name. Log file format and display columns are configured using an extension of the Apache LogFormat syntax. The collection of associations between domain name and log file is specified either by direct enumeration or a file system glob() pattern in those cases where the domain name is part of the log file path. These details are saved in an INI format configuration file in the user's home directory.
Opsview Core is a network monitoring software application. It solves the challenges of monitoring modern IT and network systems. It is a drop-in replacement for Nagios Core, with full support for its plugins and 100% compatibility. It is easy to install and configure and is ideal for monitoring applications networks, and Windows, Linux, and Unix servers. VMWare, KVM, Xen, and Microsoft Hyper-V are supported, and Amazon EC2 and other cloud services can be monitored. It works with Opsview Mobile to allow you to monitor your systems on the go.
PMSVN is a server configuration management and monitoring tool. It helps keep track of administrative actions for many servers with many administrators. It allows administrators to put specific configuration files under revision control and eases the burden of having to remember to commit changes. It can synchronize and monitor the consistency of small bits of configuration that are the same or mostly the same across many servers.
It's All Good is a simple service monitoring framework to make it easy to monitor various services on a server. Its API is dead simple, and a handful of modules are already available for common things like disk usage, checking that SMTP is running, SSL certs are valid, or a page's contents. It can easily be used with a service like Pingdom so that you can monitor your servers' health with only 1 alert (which you can get for free). It's small, compact, fast, and loads nicely on most mobile devices including your iPhone or Android device.