| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/jackmordaunt/icns | Package icns implements an encoder for Apple's `.icns` file format. |
| github.com/spf13/afero | |
| github.com/spf13/pflag | Package pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags. |
| image | Package image implements a basic 2-D image library. |
| image/jpeg | Package jpeg implements a JPEG image decoder and encoder. |
| image/png | Package png implements a PNG image decoder and encoder. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| 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. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |