Dê uma olhada em "Cauda para o Windows" . Possui os seguintes recursos em sua página da Web:
A few features of Tail: * Watch multiple files in realtime
* Detect keyword matches, and highlight occurrences
* Send mail notifications on keyword matches by SMTP or MAPI
* Plugin architecture allows you to write specialized handlers
* Can process files of any size on all types of drive (local or networked)