| google.golang.org/appengine | Package appengine provides basic functionality for Google App Engine. |
| google.golang.org/appengine/log | Package log provides the means of writing and querying an application's logs from within an App Engine application. |
| html/template | Package template (html/template) implements data-driven templates for generating HTML output safe against code injection. |
| net/http | Package http provides HTTP client and server implementations. |
| time | Package time provides functionality for measuring and displaying time. |