What is Jackson?
Jackson is a:
Streaming (reading, writing)
FAST (measured to be faster than any other Java json parser and data binder)
Powerful (full data binding for common JDK classes as well as any Java bean class, Collection, Map or Enum)
Zero-dependency (does not rely on other packages beyond JDK)
Open Source (LGPL or AL)
Fully conformant
Extremely configurable
JSON processor (JSON parser + JSON generator) written in Java. Beyond basic JSON reading/writing (parsing, generating), it also offers full node-based Tree Model, as well as full OJM (Object/Json Mapper) data binding functionality.
Swizzle started out as some stream-based parsing code I've had sitting around for quite some time. Once the project was established, it became my dumping ground for all things of a swizzling nature; poking at or mucking with unprocessed or unusable data. Generally, to swizzle unconsumable data into a consumable form.