RegEx

RegExr 0.3b, an intuitive tool for learning, writing, and testing Regular Expressions. Key features include:

Attach Library Sources and Javadocs

Artifacts with sources deployed can be attached to Eclipse libraries using downloadSources. Javadocs may be attached using downloadJavadocs The sources and javadocs of the libraries must exist in the repository so that the plugin can download it and attach it.
The following example shows how to do this in the command-line:

mvn eclipse:eclipse -DdownloadSources=true  -DdownloadJavadocs=true

or in your pom.xml:

<project>
  [...]
  <build>
    [...]
    <plugins>
      [...]
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-eclipse-plugin</artifactId>
        <version>2.8</version>
        <configuration>
          <downloadSources>true</downloadSources>
          <downloadJavadocs>true</downloadJavadocs>
        </configuration>
      </plugin>
      [...]
    </plugins>
    [...]
  </build>
  [...]
</project>