Metalogix Replicator is able to replicate list scoped and site scoped workflows, including workflow instance and associations. Replicator supports the replication of SharePoint out of the box, SharePoint Designer, Visual Studio, and Nintex list and site-scoped workflows.
Creation and modification of Workflow definitions in SharePoint Designer - Nintex included - are also replicated. Visual Studio definition creation and modification are not replicated.
Replicator does not install workflows for you. For SharePoint designer reusable workflow templates, which are workflows that are already available in SharePoint, Replicator will replicate any associations and instances.