| Software | Best for | Free tier? | |----------|----------|-------------| | (open source) | Small link analysis, social network analysis | Yes | | Maltego CE | Link analysis for OSINT investigations | Yes (limited nodes) | | Gephi | Large network visualization (research) | Yes | | Palantir Gotham (law enforcement only) | Enterprise intelligence (costly, but robust) | No | | NetCreate (by Northwest Regional Data Center) | Link charting for law enforcement training | Yes (with registration) |

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