I need a utility that could clean up old files (logs, stats, temporary files, caches, etc) in a given directory, possibly recursively, based on a combination of at least some of the following criteria:

1. Keep certain specified maximum number of files and delete the older ones
2. Keep the latest files based on maximum retained total size
3. (variation of #2) Keep the latest files with total size up to % of total/remaining space on that device
4. Remove files older than certain age

An existing GNU find command provides solution for #4, but that is just one thing it can do.

Writing a utility like that wouldn’t take long, but if there was an existing solution I’d rather use that rather than reinventing the wheel.