Logwatch - Logwatch is a customizable log analysis system.
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.
TAI .NET - .NET Framework 4.5 is a highly compatible, in-place update to .NET Framework 4.
Compact Log Viewer - Cross-platform tool to read & query JSON aka CLEF log files created by Serilog.
Log Parser Lizard - Download this ETL log parser for automated SQL querying any text based data or system logs like Web Server logs, Windows System Events and application log files.