Alpha 28 is a legendary keyboard and layout designed and championed by PyroL. His legacy is immense and powerful.
Alpha 28 distils everything that is good about a keyboard into the essential 28 keys. It inspired a plethora of designers and spawned many creative spinoffs and case ideas. Early cases by softsama and dinguxmcgee were prolific and iconic, such as the cases mimicing famous apple keyboards, designed by soft, and drop in cases with built in wrist rests or snack trays, by dingus.
Pictured below is the M0110 case by soft



Alpha28 is actually called, Alpha.

alpha-EXR
alpha.0110
alpha.ping
alpha.m
alpha.0110 top mount
alpha slope
alpha lo-pro
A variant of alpha, designed by dingusxmcgee and pcb by worldspawn. Features a reversible pcb to be used left or right handed, and a 9 key numpad to accompany the 28 key cluster.
Can be located here