A composable, multi-platform, Future-based API for HTTP requests.
A string-based path manipulation library. All of the path operations you know and love, with solid support for Windows, POSIX (Linux and Mac OS X), and the web.
The Dart analyzer settings and best practices used internally at Google.
Implementations of SHA, MD5, and HMAC cryptographic functions
Value types with builders, Dart classes as enums, and serialization. This library is the runtime dependency.
String replacement with operations that are Unicode/grapheme cluster aware.
Versions and version constraints implementing pub's versioning policy. This is very similar to vanilla semver, with a few corner cases.
Immutable collections based on the SDK collections. Each SDK collection class is split into a new immutable collection class and a corresponding mutable builder class.
A parser for YAML, a human-friendly data serialization standard