MSysM (MasarLabs System Monitor) is a lightweight X11 application that displays constantly updated graphs and data informations of your system. It uses loadable modules, so you can expand it with new modules as you like. Current modules are clock, apm, dskstat, cpu, empty, memory, netstat, serial, swap, netip, pcmcia, mail, and ppptime.
TuxKart is a 3D GoKart racing game with several famous OpenSource mascots participating. The game uses PLIB and OpenGL, and is portable to a wide range of OS's. There are several racecourses provided, with full information on how to add your own. Except for a few minor details, this game is essentially complete, and very playable.
IP-packetgenerator is a (ICMP/UDP/TCP)/IP packet generator written in Perl. When creating a TCP packet, it lets you specify the source and destination IP address, source and destination port, sequence and acknowledgement number, window size, and TCP flags. When creating a UDP packet, it lets you specify the source and destination IP and source and destination port. When creating an ICMP packet, it lets you specify the type, code, and mtu. Additionally, you can set the Time-to-live, set the fragmentation offset, send data within the packets, and select the number of packets to send over the wire. There are commandline and GUI versions. The configuration of packets can be read from a config file or saved to a config file.
Sticker Book is a children's program which lets you place stickers on a background scene. You can resize, recolour and reorient the stickers that you use, and you never run out. You can even paint with them. The program is intended for the 3-7 year olds, but it's even fun for adults. It is flexible enough to make sophisticated pictures without being as complex as drawing/painting program.