Zapier is a service which can help you connect Productive to more than 1000 third party apps.
When an action is made in Productive, Zapier sends that information to another app, triggering a reaction. This also works the other way around, so things can happen in Productive which are triggered by an action coming from a different tool.
These are just some examples, so be creative!
Zapier also allows the creation of templates for commonly used zaps. Productive zaps will streamline the process for you, by hiding unnecessary options and allowing you to select only the ones you need.