BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
klogg - klogg is the fork of glogg - the fast, smart log explorer.
TailExpert - TailExpert.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.