Octopus Deploy can talk to nuGet repository.
But, can it be integrated with Maven Repositories to poll the artifact from them?
How can we poll a java application artifact (WAR, JAR or EAR) file from a maven repo inside the Octopus Deploy and deploy it?
Source: http://docs.octopusdeploy.com/display/OD/Package+repositories#Packagerepositories-Usingexternalrepositories
However; you can push all sorts of packages to Octopus e.g.
(source: http://docs.octopusdeploy.com/display/OD/Supported+Packages)
Ultimately it sounds like you need to create NuGet (or similar) files containing your artifacts and get them up to Octopus!