Anacron is a periodic command scheduler. It executes commands at intervals specified in days. Unlike cron, it does not assume that the system is running continuously. It can therefore be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days), on systems that don't run 24 hours a day. When installed and configured properly, Anacron will make sure that the commands are run at the specified intervals as closely as machine-uptime permits.
Angst is an active sniffer, based on libpcap and libnet. It dumps into a file the payload of all the TCP packets received on the specified ports. It implements two methods for active sniffing. Angst is able to monitor ARP requests, and after enabling IP forwarding on the local host, it sends ARP replies mapping all IPs to the local MAC address. Also, it can flood the local network with random MAC addresses (like macof), causing switches to send packets to all ports.
Ansiprint is a utility for printing text files (or stdin) from remote terminals using ANSI telnet escape sequences. It was inspired by the ansiprt.c component of the University of Washington's excellent email package, PINE. However, since the author believed that ansiprt.c was released under "somewhat ridiculous terms", ansiprint has been completely re-written in C++, and includes a variety of new features.