Maven

http://maven.apache.org
http://maven.apache.org/download.html

http://www.theserverside.com/news/1364121/Setting-Up-a-Maven-Repository

Artifactory http://www.jfrog.org/sites/artifactory/latest
Proximity http://proximity.abstracthorizon.org
Dead simple Maven Proxy (DSMP) http://www.pdark.de/dsmp
Standard maven proxy http://maven-proxy.codehaus.org