| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| encoding/xml | Package xml implements a simple XML 1.0 parser that understands XML name spaces. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| gopkg.in/yaml.v2 | Package yaml implements YAML support for the Go language. |
| html/template | Package template (html/template) implements data-driven templates for generating HTML output safe against code injection. |
| io | Package io provides basic interfaces to I/O primitives. |
| net/http | Package http provides HTTP client and server implementations. |