BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
LogTailApp - LogTail is a local and remote (SSH) log file viewer and monitoring application for Mac OS X. It is a pure, modern, document-based Cocoa App
LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
Compact Log Viewer - Cross-platform tool to read & query JSON aka CLEF log files created by Serilog.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
json-log-viewer - Powerful terminal based viewer for JSON logs using ncurses.