Levenshtein distance and similarity metrics with customizable edit costs and Winkler-like bonus for common prefix.

Submatch handling improved in a copy of standard regexp package for Go (golang)

Generate, encode, and decode UUIDs v1 with fast or cryptographic-quality random node identifier.

A fluid API for composing and sending email messages via an authenticating SMTP server

An abstraction layer for all the time-passage-dependent features from the standard Go time package.

Adds levels, codes, stack trace, and custom info to `error`s in Go (golang)

Runtime panic recovery and handling (try/catch and more) in Go (golang)