Hmmm.. while you should really choose a language for reasons other than tooling, the Go language has some of the nicest tooling (gofmt, golint, godef, godoc, go

Hmmm.. while you should really choose a language for reasons other than tooling, the Go language has some of the nicest tooling (gofmt, golint, godef, godoc, go tool etc) among modern languages around and a number of languages are copying things like automatic formatting (gofmt). All the tooling is built in Unixy philosophy of composition of small command line tools and most developers use them via text editor plugins which exist for just about every major editor. There's an IDE called Lite IDE as well.