[terhechte]

Probably gocode, which is a daemon that works with different editors to offer autocompletion (i.e. vim, emacs, etc): https://github.com/nsf/gocode

[beefsack]

GoSublime also utilises gocode for ST users: https://github.com/DisposaBoy/GoSublime

[slashclee]

Awesome! Thanks for the link :)