Here are some useful Maven2 Repositorys listed.
EclipseLink:
<repository> <id>EclipseLink Repo</id> <url>http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/rt/eclipselink/maven.repo</url> </repository>
PLOIN Repository, containing ploinFaces and ploinMailFacotry:
<repository> <id>ploinPublic</id> <name>ploinPublic</name> <url>http://ploin-m2.de/nexus/content/groups/public/</url> </repository>
JSF 2.0, java.net:
<repository> <id>maven2-repository.dev.java.net</id> <name>Java.net Repository for Maven 2</name> <url>http://download.java.net/maven/2/</url> <layout>default</layout> </repository>
Ibiblio, mirror of M2:
<repository> <id>ibiblio.org</id> <name>ibiblio Repository for Maven 2</name> <url>http://mirrors.ibiblio.org/pub/mirrors/maven2/</url> <layout>default</layout> </repository>
Codehaus
<repository> <id>repository.codehaus.org</id> <name>Codehaus Repository</name> <url>http://repository.codehaus.org/</url> </repository>
Selenium:
<repository> <id>openqa-releases</id> <name>OpenQA Releases</name> <url>http://archiva.openqa.org/repository/releases/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>false</enabled> </snapshots> </repository> <repository> <id>openqa-snapshots</id> <name>OpenQA Snapshots</name> <url>http://archiva.openqa.org/repository/snapshots/</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> <repository> <id>openqa-thirdparty</id> <name>OpenQA Third Party</name> <url>http://archiva.openqa.org/repository/thirdparty/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>false</enabled> </snapshots> </repository>
Spring-Framework:
<repository> <id>springsource maven repo</id> <name>springsource maven repo</name> <url>http://maven.springframework.org/milestone</url> </repository>
JBoss:
<repository> <id>repository.jboss.org</id> <name>Jboss Repository for Maven</name> <url>http://repository.jboss.org/maven2/</url> </repository> <repository> <id>snapshots.jboss.org</id> <name>Jboss Snapshots Repository for Maven</name> <url>http://snapshots.jboss.org/maven2/</url> <snapshots> </snapshots> </repository>