Trafficlogger is a tiny program which logs your traffic from each device that is listet in /proc/net/dev. It logs all traffic (TCP, UDP,...). It is written in ANSI-C and should compile and work on nearly all Linux distributions.
S.M.A.R.T. Linux is a bootable floppy distribution containing tool (smartmontools) for monitoring IDE/SCSI hard disks (using Self-Monitoring, Analysis and Reporting Technology). It is based on Slackware Linux.