And there was also the

KRSuper2
(An effort that appears to have gone dormant, but did have a few examples under construction):

Design Parameter | KR-Super2 | KR-2S |

Length | 19' | 16' |

Wing Span | 24' | 23' |

Total Wing Area | 93 sq ft | 82 sq ft |

Empty Weight | 750 lbs | 620 lbs |

Gross Weight | 1300 lbs | 980 lbs |

Useful Load | 550 lbs | 360 lbs |

Fuel Cap | 26 gal | 16 gal |

Stall Speed | 48 mph | 52 mph |

Maximum Speed | 170 mph | 155 mph |

Cruise Speed | 140 mph | 140 mph |

Range | 600 miles | 500 miles |

Engine | Corvair 2700 | VW 2180 |

Power | 100 HP | 70 HP |

Power Loading | 13 lbs/hp | 14 lbs/hp |

Wing Loading | 14 lbs/sq ft | 12 lbs/sq ft |

Fuel Consumption | 5.5 gph | 4.5 gph |

Seating | 2 side by side | 2 side by side |

Gear | tri-grear | conventional |

Cabin Width | 43" | 38" |

Azalea Aviation (Bill Capp's Saberwing) is kit-only and has a lot of parts created in female molds, so while it is a small composite 2seater, it diverges quite a bit from the KR in my opinion.

The

*Freebird* *appears* to be a more direct continuation of the original KR project, incorporating a lot of things learned over the decades but being able to be built from plans (if desired) and presumably using the same basic construction techniques (wood and fiberglass). Or, maybe not. The "formality" of the entity behind the Freebird project isn't explicitly stated on the linked page.

The KR2 has a rich history, this will be interesting to see.