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I would like to compile a list (perhaps eventually resulting in a wiki) of notable efforts in collaborative type design. Team77 comes to mind as a very good example. A more contemporary instance would be Majoor and Buivenga.
The distribution of work can be anything: glyph design versus spacing versus hinting, Latin versus Arabic versus Cyrillic, conceptualizing versus sketching versus digitizing, etc. However I would like to exclude cases where the collaboration was inescapable - for example the yesteryear collaboration between a type designer and a punchcutter. I'm looking for cases of collaboration where the typeface could have been done by one person, but people elected to collaborate anyway.
We can flesh the list out with details, but please don't hold back if all you'd like to contribute is names (of fonts or people).