go-tools holds the golang.org/x/tools module, comprising various tools
mostly for static analysis of Go programs, some of which are listed
below.  Selected commands:

goimports  formats a Go program like go fmt and additionally inserts
	import statements for any packages required by the file after it
	is edited.

callgraph  prints the call graph of a Go program.


digraph  is a utility for manipulating directed graphs in textual
	notation.


stringer  generates declarations (including a String method) for "enum"
	types.

toolstash is a utility to simplify working with multiple versions of the
	Go toolchain.