AP3/3SUM
Multimedia asset management and manipulator for Étoilé
...AP3 also have a few foundation classes for data manipulation purpose, such as AAObject root which allows tagging object with selector-keyed arbitrarily typed bytes, or AAChunk, an equal-entry array which allows managing two or more binary streams as a single multi-field stream, or striding one stream into some, and some other partitioning abstractions. AP3 also provides a GUI system for NSOperation management, to provide the concurrency as much as everywhere-possible.