I usually hate when the swiss style is abused and used a gimmick, but this is fun. Graphic designer Mike Joyce has taken vintage punk, hardcore, and indie rock show flyers and redesigned them in the International Typographic Style.
Almir Mavignier is a Brazilian born painter and graphic designer that studied at the Ulm School of Design (hfg Ulm). During his career he has amassed a massive portfolio of excellent poster designs. His use of colors and geometrics shapes is brilliant. There was also a book published featuring his posters titled, Almir Mavignier: Additive Posters.
Via Ricardo Nucci
The Salone Internazionale del Mobile is a trade fair that was formed in 1961 that is a showcase of excellent Italian furniture. Dwell has featured a great gallery showing the evolution of the event posters. My favorites are pictured here. Both were designed by by Alberto Longhi, the top in 1968, and the one below was done in 1976. You can find some additional information here.