Virgo is an open source, OSGi-based, Java application server.

[2] Virgo is based on the Equinox OSGi implementation, part of the Eclipse project.

Virgo Server for Apache Tomcat is the primary distribution for OSGi development.

Virgo uses Spring Framework which is embedded and made available as a run-time dependency to deployed applications.

[9] In 2013 SpringSource contributions to Eclipse Virgo came to an end and the team members got reallocated to different projects.