Timeline displays a navigatable timeline. It provides zooming in on events, varies the presentation accordingly, can jump to a specific data, search event text notes, organize them in a tree instead. Events can be added per wizard or dragged and resized visually.
Filewatch uses the linux 'fanotify' subsystem to monitor filesystem events. It can trigger on open, modify and close events and write to logs, send to syslog, exec a command, or update filesystem extended attributes (xattr) in response to events, including updating a 'last changed' xattr that records who/what/when changed a file.