The WebReboot Plugin for Nagios is a suite of commands that can be used within Nagios to monitor a server and take corrective action if necessary via the WebReboot line of products. For example, the plugin can be used to alert you if a host is powered down, versus simply not responding to network requests. Likewise, it can be used to reboot a server if a host fails to respond to ping, or to shut down a server when a critical temperature threshold is exceeded. The commands can be mixed-and-matched with all existing Nagios commands, maximizing total network coverage.
Simple simeng (simple simulation engine) is a bare bones Java-based discrete simulation engine that uses variable time steps. Events are inserted in an ordered queue, and time is advanced based on the time the next event needs to be executed instead of discrete predefined timesteps. Entities can send events directly to other entities (one-2-one), or events can be broadcast to subscribed entities (one-2-many). The simplicity of the engine makes it suitable for educational purposes.
Sambuca is a Java HTTP server framework that allows developers to embed an HTTP server directly in their applications with custom HTTP request handlers, so that their application can directly process incoming HTTP requests and easily send back HTTP formatted responses to the requesting client. Applications can host standalone HTTP services such as Web Services without having to deploy and integrate with a full application server such as Tomcat, JBoss, or WebLogic.