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# Educational

- **[Childsplay](childsplay.md)** (Python, GPL-3.0, mature)
- **[ORIENT](orient.md)** (C#, Java, GPL-2.0, mature, inactive since 2009)
- **[Tux of Math Command](tux_of_math_command.md)** (C, GPL-3.0, mature, inactive since 2011)