If you want something very basic, there is the Vivitar Ultra Wide & Slim. Basically, a point and shoot with a 22mm lens. One shutter speed. No flash. Best used with a 400 speed film. Vignettes, but the lens is good.
Olympus had three cameras in the 1960s with a 35mm lens. Two were scale focus, one with a meter. A third model had a rangefinder. All are very well made and somewhat pricey. They were called the "Olympus Wide" with the "Olympus Wide-S" being the premium model with the rangefinder, I believe.
I can't think of too many other manual-focus fixed-lens wide angle cameras, aside from those already mentioned.
Personally, I think if you're looking for something compact, you would be well served with a Cosina Voigtlander Bessa L + 25mm Snapshot Skopar or one of the other cameras mated to a Bessa-R2. Or perhaps a screw-mount Leica or even the Minolta/Leica CLE/CLE.