The tag "zeta-function" seems to have been made synonomous with "riemann-zeta".
This came up in the comments section of this question.
Perhaps this should be reconsidered. There are other zeta-functions besides Riemann's. (Apart from other zeta-functions occuring in number-theory/arithmetic geometry, there are also Selberg zeta-functions, various dynamical zeta-functions, and so on.)
What do people think?