BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
Wazuh - Open Source Host and Endpoint Security
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
Beats - Beats is the platform for single-purpose data shippers that is installed as lightweight agents and send data to machines to Logstash or Elasticsearch.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.