| C | Package C is a "pseudo-package" used to access the C namespace from a cgo source file. |
| encoding/binary | Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/mobile/event/size | Package size defines an event for the dimensions, physical resolution and orientation of the app's window. |
| golang.org/x/mobile/exp/f32 | Package f32 implements some linear algebra and GL helpers for float32s. |
| golang.org/x/mobile/geom | Package geom defines a two-dimensional coordinate system. |
| golang.org/x/mobile/gl | Package gl implements Go bindings for OpenGL ES 2. |
| image | Package image implements a basic 2-D image library. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |