We are using Maven for a large build process (> 100 modules). We have been storing our external dependencies in source control, and using that to update a local repo.
<
I see that Nexus usage is growing, while Artifcatory usage is generaly staying flat.
Picture is taken from here http://blog.sonatype.com/2014/11/42000-nexus-repository-managers-and-growing/
There is also matrix-comparison http://docs.codehaus.org/display/MAVENUSER/Maven+Repository+Manager+Feature+Matrix