1. SiphashSimple and secure hashing in Swift with the SipHash algorithm
2. BtreeFast sorted collections for Swift using in-memory B-trees
3. AttabenchMicrobenchmarking app for Swift with nice log-log plots
5. BigintArbitrary-precision arithmetic in pure Swift
6. GluekitType-safe observable values and collections in Swift
7. DequeA double-ended queue type in pure Swift