Logreporter is a project mainly written in JAVASCRIPT and RUBY, it's free.
parse logs with log analyser request-log-analyzer -d logs.db /var/log/daemons/logname
prepare logreporter bundle exec install
generate only index file bundle exec logreporter
generate daily report DATE='rr-mm-dd' bundle exec logreporter
generate newest daily reports ONLY_NEW=1 bundle exec logreporter
generate all daily reports ALL=1 bundle exec logreporter
every time, when daily reports are generated, index and tar file in tar directory are overwritten