AntiSpam is a daemon that keeps an eye on the mail log and watches for POP3 logins on the machine. The Apache JServ is a Java servlet engine, an external process written in Java which runs separate from the web server and handles requests to Java servlets. Apmiser is a daemon that monitors the CPU usage patterns of your laptop and automatically switches between power-saving mode and normal mode, depending on whether it thinks you will need the extra CPU speed. Astaro Security Linux is a new firewall solution.
Avatar is a robust job scheduling application suite, with a highly sophisticated built-in scheduler.
BetaFTPD is a single-threaded FTP daemon. Clustering is the idea of making several computers act as one for the purposes of either performance or reliability.