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Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Red5 Server core
AngularJS Eclipse Plugin
Python IDE for Eclipse
Java language server
Gradle plugin to use Android AAR libraries on Eclipse.
Skript is a Bukkit plugin which allows server admins to customize their server easily, but without the hassle of programming a plugin or asking/paying someone to program a plugin for them.
GWT Eclipse Plugin Documentation
Supports configurable, Eclipse like, save actions, including "organize imports", "reformat code" and "rearrange code".
Eclipse Workspace and code lessons for TKP Java
Formatter Maven Plugin - Exported from code.google.com/p/maven-java-formatter-plugin
Yakindu Statechart Tools (http://www.statecharts.org)