The latest “Kasyapa for Leica” reviews (“Kasyapa for Leica” by MAP camera contains many more reviews on their main page):
Leica SUMMILUX M50mm F1.4 11714 (see also B&H Photo listing)
Leica SUMMICRON L50mm F2 (retractable)
Voigtlander NOKTON 50mm F1.5 L39
Voigtlander APO-ULTRON 90mm F2 VM (see also B&H Photo listing)
Voigtlander COLOR-SKOPAR 35mm F3.5 Aspherical VM (see also B&H Photo listing)