Snarl - Snarl is a notification system for Windows.
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
Growl for Windows - Growl for Windows is a Windows-compatible version of https://alternativeto.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.
klogg - klogg is the fork of glogg - the fast, smart log explorer.