The Scala IDE for Eclipse is centered around seamless integration with the Eclipse Java tools, providing many of the features Eclipse users have come to expect including,

Support for mixed Scala/Java projects and any combination of Scala/Java project dependencies. Type driven operations are transparent across Scala and Java files and projects, allowing straightforward references from Scala to Java and vice versa.
A Scala editor with syntax highlighting, inferred type and scaladoc hovers, hyperlinking to definitions, code completion, error and warning markers, indentation, brace matching.
Project and source navigation including Scala support in the Package explorer view with embedded outline, outline view, quick outline, open type, open type hierarchy.
Incremental compilation, application launching with integrated debugger, hyperlinking from stacktraces to Scala source, interactive console.
Support for Eclipse plugin and OSGi development including hyperlinking to Scala source from plugin.xml and manifest files.

The Scala IDE is released under a BSD-like license and community involvement in its development is strongly encouraged. See the Developer Documentation on how to take part.

The User Documentation is the starting point for the installation guide and other information regarding the use of the Scala IDE for Eclipse.