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LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
Logspire - Logspire is a web-based log viewer.
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
klogg - klogg is the fork of glogg - the fast, smart log explorer.
Nerdlog - Nerdlog is a fast, remote-first, multi-host TUI log viewer with timeline histogram and no central server. Loosely inspired by Graylog/Kibana, but without the bloat. Pretty much no setup needed, either.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.