Clfmerge - merge common-log-format web logs in order without sorting (good for when you have a gig of logs).

logprn - like "tail -f" but after a specified time period of inactivity will run a program (such as lpr) and pipe the new data to it)

funnel - pipe one stream of data to several files or processes.

clfsplit - split CLF format web logs by client IP address.

clfdomainsplit - split CLF logs by server domain.