This is taken from @rvxnet’s answer and an example of why link-only answer are not desirable. I’ve taken this from the 2015-05-20 WaybackMachine version of their link:
Official, but not browseable:
- https://repo1.maven.org/maven2
Others:
- https://maven.antelink.com/content/repositories/central/
Also, there are official instructions for configuring to use mirrors. Essentially, you add to you settings.xml
the something like the following:
<mirrors>
<mirror>
<id>planetmirror.com</id>
<name>PlanetMirror Australia</name>
<url>http://downloads.planetmirror.com/pub/maven2</url>
<mirrorOf>central</mirrorOf>
</mirror>
</mirrors>