LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
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
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
json-log-viewer - Powerful terminal based viewer for JSON logs using ncurses.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
klogg - klogg is the fork of glogg - the fast, smart log explorer.