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
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
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
in'side log - Colorized real-time log viewer with remote tail over SSH support for Windows, Mac and Linux.