Some tools regularly create new files, and never clean them up. limitfiles uses inotify to keep them from getting out of hand.
Python 3.1+ and pyinotify.
# python3 setup.py install
limitfiles reads sections like this from /etc/limitfiles.ini:
[Example]
directory=/tmp/example
keep=20
max=40
match=\.log$
The section name is the name for this watch; you can use whatever you like.
directory is the directory to watch with inotify. If you specify a Python regular expression as match, limitfiles will only keep track of files with matching names.
When the count of watched files hits the number in max, limitfiles will delete the oldest ones until it gets down to the number in keep.
You can define as many sections like this as you need.
Refer to the pydoc for command-line options and module documentation.