Trackball History
Here is a list of defunct and interesting trackballs. (Note, this is not a complete list of trackball history.)

Marble Madness 1984

Alfa Data 1990

Logitech Trackman 1989

Kensington Expert Mouse 1989 (55 mm)

Kensington Expert Mouse 1992 (55 mm)

Highscreen 1993

Addison Tech Pro 1994 (51 mm)

Stingray 1995

Logitech TrackMan Vista
1995 (43 mm)

Logitech TrackMan Marble FX 1997 (52 mm)

Kensington Turbo Mouse, 1999 (55 mm)

Kensington Orbit 1999

Kensington TurboRing 1999

Microsoft TrackBall Optical 2001 (38 mm)

Microsoft Trackball Explorer 2001 (46 mm)

MacMice 2005. (44 mm)

Adesso T1 2010

Sanwa MA-TB38BK 2015 (55 mm)

Tesoro G6TL 2016
Logitech History
Logitech Most Important Products