json-log-viewer - Powerful terminal based viewer for JSON logs using ncurses.
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.
klogg - klogg is the fork of glogg - the fast, smart log explorer.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
Angle-grinder - Command-line tool to parse, aggregate, sum, average, min/max, percentile, and sort log data.