Gson is an excellent library every Java/Android developer should know. You can easily parse a Json or XML network response into a POJO class and get ready to go. But the guys who started the project I currently support found a better, smarter, slicker way to parse network responses into memory:

ArrayList<ArrayList<HashMap<String, String>>>

I would love to meet the genius who came up with this idea. I mean, you can parse absolutely any API response without even having to define stupid Java classes or importing libraries! And also you can reutilize the same scheme for literally all Java projects that handle API responses! Wonderful