The Marketo Java SDK by Marketo allows to interact with the API. Resources allow to generate a Java client and use with Secret Key. The code, available on GitHub, was created with WSDL. Authored by Travis Kaufman.
Although Igloo already promoted a number of automated integrations with popular apps like Dropbox, box, G Suite, and others; Igloo stopped short of completely opening its digital workplace framework to the entire developer community. That has now changed, along with full support.
Expion, a Social Media Management System (SMMS) company, specializes in helping companies manage their brand images on social networks, from Facebook to Youtube to Twitter, often relying on partners' APIs to pull of some of their more interesting feats. Most recently, it was chosen by Google as a Google Plus API partner for the brand-focused Pages feature.