Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...

AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.

Lucene - Search Engines

RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems

ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.