Open Chronology
Free, open-source timeline editor for exact dates at any scale.
...Create moments and durations with relationships, Markdown notes, tags, images, sources, custom metadata, and date precision. Explore timelines with up to 200,000 events, compare or combine timelines, and collaborate through forks and pull requests.
Features include public timelines, embeddable views, log imports, live syslog ingestion, causal-factor charts, plugins, and an OpenAPI-documented HTTP API.
Use OpenChronology at timescale.info, as a Windows, macOS, or Linux desktop app, as a standalone offline HTML file, or self-host it with PostgreSQL. Multiple installation packages are available.
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