glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
klogg - klogg is the fork of glogg - the fast, smart log explorer.
LogViewPlus - Looking for a better log viewer? LogViewPlus is a professional log file viewer that can parse, read, tail, merge and analyze log files in any format. Remote log files (SFTP) and large files are supported. Easy configuration.
LNAV - The Log File Navigator (lnav) is an advanced log file viewer for the console.
json-log-viewer - Powerful terminal based viewer for JSON logs using ncurses.
LOG4VIEW - Log4View is a convenient viewer for XML or pattern formated log4net, log4j or log4cxx logging output.