[table][tr][td]1784[/td][td]Watt's linkage[/td][/tr][tr][td]1854[/td][td]Chebyshev's linkage[/td][/tr][tr][td]1877[/td][td]Kempe's lectures on linkages[/td][/tr][tr][td]1984[/td][td]Lego Technic[/td][/tr][tr][td]1990[/td][td]Strandbeest (Theo Jansen)[/td][/tr][tr][td]1998[/td][td]The Geometer's Sketchpad, numerical locus[/td][/tr][tr][td]1998[/td][td]Theatrum Machinarum, Modena, Italy[/td][/tr][tr][td]2002[/td][td]GDI-Discovery, symbolic locus via CoCoA/Mathematica (Valcarce-Botana)[/td][/tr][tr][td]2002[/td][td]Proof on universality of linkages (Kapovich-Millson)[/td][/tr][tr][td]2010[/td][td]LADucation, combining DG and CAS via the web (Abánades-Escribano-Botana)[/td][/tr][tr][td]2011[/td][td]GeoGebra's [b]LocusEquation[/b] command (Abánades-Arbeo-Botana)[/td][/tr][tr][td]2013[/td][td]Lego Mindstorms EV3[/td][/tr][/table]