[lmm]

Is there demonstrably great software written in Go yet? I've seen some people using it but I've yet to see a "killer app" (the way e.g. MLDonkey convinced me I should take OCaml seriously, or Pandoc convinced me I should take Haskell seriously).

[laumars]

A few spring to mind. Such as Docker and large parts of Google and CloudFlare.

However I think your benchmark for a language's worth is a pretty superficial one.

[koffiezet]

Docker.io?