The Bubbling Load Monitor (or "Bubblemon" for short) is a system load monitor for the GNOME panel. It looks like a vial containing water. The water level indicates how much (electronic) memory is in use. The color of the liquid indicates how much swap space is used. The amount of bubbles reflects the system CPU load. A message in a bottle indicates there is unread mail. A reed-like graph shows I/O load. On multi-core systems the CPU with the highest load will bubble in the middle, and the others on the sides, so it's possible to see how well load gets distributed between CPUs.
Butterfly is a timing system designed for environments in which time spent on the Internet is charged for. Using ipchains(8) firewalling software, the Butterfly daemon cooperates with a web-based administration interface and a client interface to control time spent browsing. The ISP Edition allows the creation of several 'sites' and provides detailed accounting information for all the sites included.
BW whois is a modern whois client that works as a full-featured Web application or as a commandline tool. It is flexible and configurable with self-detecting CGI support, multiple security options in the CGI mode, a mature TLD table, database caching (using MySQL or PostgreSQL), and many more options and features.
Cheops-ng is a network management tool for mapping and monitoring your network. It has host/network discovery functionality and OS detection, and does a port scan of each computer to tell what services are running. It can probe FTP, HTTP, ssh, email (port 25), news, IMAP, and VNC to see what version and type of server is running on those ports.