Looking for a log/timeline visualization tool

Ideally I want to import/correlate logs between several different clients/servers, which many things like Google BigQuery, & Splunk do...

However, I want to visualize them in a step-by-step timeline where I can see key events (reboot, segfault, abort, etc.) and get a "big picture" of what the entire client/server system is doing at those times.

Anybody every seen/used things like this?