Sonatype Nexus Repository is a software repository manager, available under both an open-source license and a proprietary license.

[1] It can combine repositories for various programming languages, so that a single server can be used as a source for building software.

Alternatives to Nexus include JFrog Artifactory.

[2] Tamás Cservenák originally developed Proximity in 2005, because he had a slow ADSL internet connection.

He was later hired by Sonatype to build a similar product, Nexus.