Eclipse is probably best known as a Java IDE, but it is more: it is an IDE framework, a tools framework, an open source project, a community, an eco-system, and a foundation.https://www.eclipse.org/eclipse.org-common/themes/solstice/public/images/logo/eclipse-200x200.png
The Server Tools project is a sub-project in the Eclipse WTP Top-Level Project. Its main goal is to provide a extensible server framework to provide support but not exclusisvely for J2EE, JEE, and HTTP Servers.
This project overview page is continually evolving, so please check back regularly for the most up-to-date information on the Server Tools project. In the meantime, consult the older Server overview page page, as well as those our archived out of date information, if it of any use to you Server archives docs.