Honeill Update Log keeps a tidy record of everything that happens to the plugins on your site, so you always know what changed and when — invaluable when a site breaks right after an update, or when several people manage the same install.
For every event it records:
View the log under Tools Update Log, filter by event type, page through it, and export the whole thing to CSV. Old entries are pruned automatically.
Unlike the big all-in-one activity loggers, this does one thing: plugin lifecycle events, lightweight and exportable.
Everything is stored in a single custom table in your own database. The plugin makes no external connections and sends no data anywhere. It records the WordPress display name (or login) of the user who performed each action, purely for your own audit trail.