The folks at Lucidworks recently announced Silk – a logging and monitoring solution for enterprises using open source components like Solr, Kibana and Logstash.
You can learn more about their product on the Lucidworks website http://www.lucidworks.com/lucidworks-silk. Clearly, the logging and monitoring space has spawned many interesting open source options, e.g. Elasticsearch is also a Lucene based solution that has integrated Kibana and Logstash. Based on discussions with early adopters, Lucidworks seems to be making an enterprise play by offering a more complete enterprise ready solution because they have a “Big Data” offering as well.