| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/nicksnyder/go-i18n/i18n/bundle | Package bundle manages translations for multiple languages. |
| github.com/nicksnyder/go-i18n/i18n/language | Package language defines languages that implement CLDR pluralization. |
| github.com/nicksnyder/go-i18n/i18n/translation | Package translation defines the interface for a translation. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |