I was searching for Apache Tomcat 7 Maven plugin. I found only messages that no such thing exists and that I have to use some workaround. Finally I found link at StackOwerflow that pointed me to the testing version of  such a plugin.

You just need to configure repository and update mojo definition.

 <repositories>
    <repository>
      <id>people.apache.snapshots</id>
      <url>http://repository.apache.org/content/groups/snapshots-group/</url>
      <releases>
        <enabled>false</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </repository>
  </repositories>

  <pluginRepositories>
    <pluginRepository>
      <id>apache.snapshots</id>
      <name>Apache Snapshots</name>
      <url>http://repository.apache.org/content/groups/snapshots-group/</url>
      <releases>
        <enabled>false</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </pluginRepository>
  </pluginRepositories>

...

<plugin>
      <groupId>org.apache.tomcat.maven</groupId>
      <artifactId>tomcat7-maven-plugin</artifactId>
      <version>2.0-SNAPSHOT</version>
      <configuration>
        <path>/</path>
      </configuration>
    </plugin>

You can run Tomcat7 by: mvn tomcat7:run

You can read more about this new version of Tomcat Maven plugin at tomcat.apache.org.

This plugin is still under development.

BTW: List Maven plugins hosted at Apache.org is available at maven.apache.org/plugins.