Gony
A tiny and lightweight IDE for the Go programming language
Gony is an free, open-source, tiny and fast IDE for the Go programming language, designed to be easy.
Write (and also learn) Go applications, in minutes. Gony has an integrated GoDoc Reference Widget which helps you at the whole time you code.
Gony is very extensible and can be configured as well (Stylesheets, Themes, Plugins and more).