TEE para Windows
O TEE permite redirecionar a saída padrão para um arquivo e exibi-lo na tela simultaneamente.
some_program | TEE [ /D:nn ] file_name
Disponível como scripts BAT, Perl e Regina.
Nota do autor.
The Rexx and Perl scripts will start displaying the result immediately. For the batch file, what it boils down to is, you may just as well redirect the command's output to a file and then display that file afterwards. As a bonus, that way you won't skip empty lines.
Note: These scripts were written just for fun. Even though the do work, they cannot compete with the "real" stuff -- compiled executables, written in "true" programming languages by true programmers.
Eu uso o Cygwin.
Há também o utilitário Tee para Windows atualizado