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GNU Timeline is a basic timeline building application with some nice features. It is free, and it works on Windows and Linux (Probably Mac also). http://thetimelineproj.sourceforge.net/
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/5124 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/