BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
Snarl - Snarl is a notification system for Windows.
LogViewPlus - Looking for a better log viewer? LogViewPlus is a professional log file viewer that can parse, read, tail, merge and analyze log files in any format. Remote log files (SFTP) and large files are supported. Easy configuration.
Notifu - Notifu, a free open source pop-up balloon utility
klogg - klogg is the fork of glogg - the fast, smart log explorer.
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.