- Fiber - cooperative multitasking written in Swift
- Event - async event loop (kqueue, epoll)
- Network - socket, server, client, dns
- FileSystem - path, directory, file
- Stream - io abstractions, basic streams
- IPC - sync primitives: notify, broadcast
- Storage - multipurpose data storage
- JSON - streaming encoder/decoder
- MessagePack - streaming encoder/decoder
- Radix - optimized Base64, Hex coding
- XML - streaming encoder/decoder
- RPC - streaming encoder/decoder
- URL - url encoder/decoder
- JavaScript - basic protocols to embed JavaScript in your Swift application (V8, ChakraCore, JavaScriptCore)
- Music - notes, pitch detection, midi
- Platform - libc abstraction
- Compression - gzip, deflate
- Structures - common structures
- Time - datetime & coding
- Async - abstraction to use Fiber and swap implementations
- Process - (sub)process abstraction
- Test - simplified testing
- Log - general log system
- Math - missing functions
- PostgreSQL - asynchronous client
- GitHub - github api client
- OpenSubtitles - opensubtitles api client