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 curses). 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.
* Merge 2 or more logfiles.
* Use colors while displaying the logfiles (through regular
  expressions), for faster recognition of what is important and what not.
* Filter lines (again with regular expressions) and has interactive
  menus for editing given regular expressions and deleting and adding
  windows.
* 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.