1. HopperA Rust mpsc with unbounded members in bounded memory
2. PmkvobserverModern thread-safe and type-safe key-value observing for Swift and Objective-C
3. PmhttpSwift/Obj-C HTTP framework with a focus on REST and JSON
4. PmjsonPure Swift JSON encoding/decoding library
5. Cernantelemetry aggregation and shipping, last up the ladder