misc/multitail - The NetBSD Packages Collection

MultiTail lets you view one or multiple files like the original tail
program. The difference is that it creates multiple windows on your
console (with ncurses). It can also monitor wildcards: if another file
matching the wildcard has a more recent modification date, it will
automatically switch to that file. That way you can, for example,
monitor a complete directory of files. Merging of 2 or even more
logfiles is possible. It can also use colors while displaying the
logfiles (through regular expressions), for faster recognition of what
is important and what not. It can also filter lines (again with regular
expressions). It has interactive menus for editing given regular
expressions and deleting and adding windows. One can also have windows
with the output of shell scripts and other software. When viewing the
output of external software, MultiTail can mimic the functionality of
tools like 'watch' and such.