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.
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.